sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity
minix/sys/ufs/ufs/ufs_quota1.c
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC) 
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

904 lines
24 KiB
C
Raw Permalink Blame History

/* $NetBSD: ufs_quota1.c,v 1.18 2012/02/02 03:00:48 matt Exp $ */
/*
* Copyright (c) 1982, 1986, 1990, 1993, 1995
* 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.
*
* @(#)ufs_quota.c 8.5 (Berkeley) 5/20/95
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ufs_quota1.c,v 1.18 2012/02/02 03:00:48 matt Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/file.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/kauth.h>
#include <ufs/ufs/quota1.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/ufs/ufs_quota.h>
static int chkdqchg(struct inode *, int64_t, kauth_cred_t, int);
static int chkiqchg(struct inode *, int32_t, kauth_cred_t, int);
/*
* Update disk usage, and take corrective action.
*/
int
chkdq1(struct inode *ip, int64_t change, kauth_cred_t cred, int flags)
{
struct dquot *dq;
int i;
int ncurblocks, error;
if ((error = getinoquota(ip)) != 0)
return error;
if (change == 0)
return (0);
if (change < 0) {
for (i = 0; i < MAXQUOTAS; i++) {
if ((dq = ip->i_dquot[i]) == NODQUOT)
continue;
mutex_enter(&dq->dq_interlock);
ncurblocks = dq->dq_curblocks + change;
if (ncurblocks >= 0)
dq->dq_curblocks = ncurblocks;
else
dq->dq_curblocks = 0;
dq->dq_flags &= ~DQ_WARN(QL_BLOCK);
dq->dq_flags |= DQ_MOD;
mutex_exit(&dq->dq_interlock);
}
return (0);
}
for (i = 0; i < MAXQUOTAS; i++) {
if ((dq = ip->i_dquot[i]) == NODQUOT)
continue;
if ((flags & FORCE) == 0 &&
kauth_authorize_system(cred, KAUTH_SYSTEM_FS_QUOTA,
KAUTH_REQ_SYSTEM_FS_QUOTA_NOLIMIT, KAUTH_ARG(i),
KAUTH_ARG(QL_BLOCK), NULL) != 0) {
mutex_enter(&dq->dq_interlock);
error = chkdqchg(ip, change, cred, i);
mutex_exit(&dq->dq_interlock);
if (error != 0)
return (error);
}
}
for (i = 0; i < MAXQUOTAS; i++) {
if ((dq = ip->i_dquot[i]) == NODQUOT)
continue;
mutex_enter(&dq->dq_interlock);
dq->dq_curblocks += change;
dq->dq_flags |= DQ_MOD;
mutex_exit(&dq->dq_interlock);
}
return (0);
}
/*
* Check for a valid change to a users allocation.
* Issue an error message if appropriate.
*/
static int
chkdqchg(struct inode *ip, int64_t change, kauth_cred_t cred, int type)
{
struct dquot *dq = ip->i_dquot[type];
long ncurblocks = dq->dq_curblocks + change;
KASSERT(mutex_owned(&dq->dq_interlock));
/*
* If user would exceed their hard limit, disallow space allocation.
*/
if (ncurblocks >= dq->dq_bhardlimit && dq->dq_bhardlimit) {
if ((dq->dq_flags & DQ_WARN(QL_BLOCK)) == 0 &&
ip->i_uid == kauth_cred_geteuid(cred)) {
uprintf("\n%s: write failed, %s disk limit reached\n",
ITOV(ip)->v_mount->mnt_stat.f_mntonname,
quotatypes[type]);
dq->dq_flags |= DQ_WARN(QL_BLOCK);
}
return (EDQUOT);
}
/*
* If user is over their soft limit for too long, disallow space
* allocation. Reset time limit as they cross their soft limit.
*/
if (ncurblocks >= dq->dq_bsoftlimit && dq->dq_bsoftlimit) {
if (dq->dq_curblocks < dq->dq_bsoftlimit) {
dq->dq_btime =
time_second + ip->i_ump->umq1_btime[type];
if (ip->i_uid == kauth_cred_geteuid(cred))
uprintf("\n%s: warning, %s %s\n",
ITOV(ip)->v_mount->mnt_stat.f_mntonname,
quotatypes[type], "disk quota exceeded");
return (0);
}
if (time_second > dq->dq_btime) {
if ((dq->dq_flags & DQ_WARN(QL_BLOCK)) == 0 &&
ip->i_uid == kauth_cred_geteuid(cred)) {
uprintf("\n%s: write failed, %s %s\n",
ITOV(ip)->v_mount->mnt_stat.f_mntonname,
quotatypes[type],
"disk quota exceeded for too long");
dq->dq_flags |= DQ_WARN(QL_BLOCK);
}
return (EDQUOT);
}
}
return (0);
}
/*
* Check the inode limit, applying corrective action.
*/
int
chkiq1(struct inode *ip, int32_t change, kauth_cred_t cred, int flags)
{
struct dquot *dq;
int i;
int ncurinodes, error;
if ((error = getinoquota(ip)) != 0)
return error;
if (change == 0)
return (0);
if (change < 0) {
for (i = 0; i < MAXQUOTAS; i++) {
if ((dq = ip->i_dquot[i]) == NODQUOT)
continue;
mutex_enter(&dq->dq_interlock);
ncurinodes = dq->dq_curinodes + change;
if (ncurinodes >= 0)
dq->dq_curinodes = ncurinodes;
else
dq->dq_curinodes = 0;
dq->dq_flags &= ~DQ_WARN(QL_FILE);
dq->dq_flags |= DQ_MOD;
mutex_exit(&dq->dq_interlock);
}
return (0);
}
for (i = 0; i < MAXQUOTAS; i++) {
if ((dq = ip->i_dquot[i]) == NODQUOT)
continue;
if ((flags & FORCE) == 0 && kauth_authorize_system(cred,
KAUTH_SYSTEM_FS_QUOTA, KAUTH_REQ_SYSTEM_FS_QUOTA_NOLIMIT,
KAUTH_ARG(i), KAUTH_ARG(QL_FILE), NULL) != 0) {
mutex_enter(&dq->dq_interlock);
error = chkiqchg(ip, change, cred, i);
mutex_exit(&dq->dq_interlock);
if (error != 0)
return (error);
}
}
for (i = 0; i < MAXQUOTAS; i++) {
if ((dq = ip->i_dquot[i]) == NODQUOT)
continue;
mutex_enter(&dq->dq_interlock);
dq->dq_curinodes += change;
dq->dq_flags |= DQ_MOD;
mutex_exit(&dq->dq_interlock);
}
return (0);
}
/*
* Check for a valid change to a users allocation.
* Issue an error message if appropriate.
*/
static int
chkiqchg(struct inode *ip, int32_t change, kauth_cred_t cred, int type)
{
struct dquot *dq = ip->i_dquot[type];
long ncurinodes = dq->dq_curinodes + change;
KASSERT(mutex_owned(&dq->dq_interlock));
/*
* If user would exceed their hard limit, disallow inode allocation.
*/
if (ncurinodes >= dq->dq_ihardlimit && dq->dq_ihardlimit) {
if ((dq->dq_flags & DQ_WARN(QL_FILE)) == 0 &&
ip->i_uid == kauth_cred_geteuid(cred)) {
uprintf("\n%s: write failed, %s inode limit reached\n",
ITOV(ip)->v_mount->mnt_stat.f_mntonname,
quotatypes[type]);
dq->dq_flags |= DQ_WARN(QL_FILE);
}
return (EDQUOT);
}
/*
* If user is over their soft limit for too long, disallow inode
* allocation. Reset time limit as they cross their soft limit.
*/
if (ncurinodes >= dq->dq_isoftlimit && dq->dq_isoftlimit) {
if (dq->dq_curinodes < dq->dq_isoftlimit) {
dq->dq_itime =
time_second + ip->i_ump->umq1_itime[type];
if (ip->i_uid == kauth_cred_geteuid(cred))
uprintf("\n%s: warning, %s %s\n",
ITOV(ip)->v_mount->mnt_stat.f_mntonname,
quotatypes[type], "inode quota exceeded");
return (0);
}
if (time_second > dq->dq_itime) {
if ((dq->dq_flags & DQ_WARN(QL_FILE)) == 0 &&
ip->i_uid == kauth_cred_geteuid(cred)) {
uprintf("\n%s: write failed, %s %s\n",
ITOV(ip)->v_mount->mnt_stat.f_mntonname,
quotatypes[type],
"inode quota exceeded for too long");
dq->dq_flags |= DQ_WARN(QL_FILE);
}
return (EDQUOT);
}
}
return (0);
}
int
quota1_umount(struct mount *mp, int flags)
{
int i, error;
struct ufsmount *ump = VFSTOUFS(mp);
struct lwp *l = curlwp;
if ((ump->um_flags & UFS_QUOTA) == 0)
return 0;
if ((error = vflush(mp, NULLVP, SKIPSYSTEM | flags)) != 0)
return (error);
for (i = 0; i < MAXQUOTAS; i++) {
if (ump->um_quotas[i] != NULLVP) {
quota1_handle_cmd_quotaoff(l, ump, i);
}
}
return 0;
}
/*
* Code to process quotactl commands.
*/
/*
* set up a quota file for a particular file system.
*/
int
quota1_handle_cmd_quotaon(struct lwp *l, struct ufsmount *ump, int type,
const char *fname)
{
struct mount *mp = ump->um_mountp;
struct vnode *vp, **vpp, *mvp;
struct dquot *dq;
int error;
struct pathbuf *pb;
struct nameidata nd;
if (ump->um_flags & UFS_QUOTA2) {
uprintf("%s: quotas v2 already enabled\n",
mp->mnt_stat.f_mntonname);
return (EBUSY);
}
if (mp->mnt_wapbl != NULL) {
printf("%s: quota v1 cannot be used with -o log\n",
mp->mnt_stat.f_mntonname);
return (EOPNOTSUPP);
}
vpp = &ump->um_quotas[type];
pb = pathbuf_create(fname);
if (pb == NULL) {
return ENOMEM;
}
NDINIT(&nd, LOOKUP, FOLLOW, pb);
if ((error = vn_open(&nd, FREAD|FWRITE, 0)) != 0) {
pathbuf_destroy(pb);
return error;
}
vp = nd.ni_vp;
pathbuf_destroy(pb);
VOP_UNLOCK(vp);
if (vp->v_type != VREG) {
(void) vn_close(vp, FREAD|FWRITE, l->l_cred);
return (EACCES);
}
if (*vpp != vp)
quota1_handle_cmd_quotaoff(l, ump, type);
mutex_enter(&dqlock);
while ((ump->umq1_qflags[type] & (QTF_CLOSING | QTF_OPENING)) != 0)
cv_wait(&dqcv, &dqlock);
ump->umq1_qflags[type] |= QTF_OPENING;
mutex_exit(&dqlock);
mp->mnt_flag |= MNT_QUOTA;
vp->v_vflag |= VV_SYSTEM; /* XXXSMP */
*vpp = vp;
/*
* Save the credential of the process that turned on quotas.
* Set up the time limits for this quota.
*/
kauth_cred_hold(l->l_cred);
ump->um_cred[type] = l->l_cred;
ump->umq1_btime[type] = MAX_DQ_TIME;
ump->umq1_itime[type] = MAX_IQ_TIME;
if (dqget(NULLVP, 0, ump, type, &dq) == 0) {
if (dq->dq_btime > 0)
ump->umq1_btime[type] = dq->dq_btime;
if (dq->dq_itime > 0)
ump->umq1_itime[type] = dq->dq_itime;
dqrele(NULLVP, dq);
}
/* Allocate a marker vnode. */
mvp = vnalloc(mp);
/*
* Search vnodes associated with this mount point,
* adding references to quota file being opened.
* NB: only need to add dquot's for inodes being modified.
*/
mutex_enter(&mntvnode_lock);
again:
for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) {
vmark(mvp, vp);
mutex_enter(vp->v_interlock);
if (VTOI(vp) == NULL || vp->v_mount != mp || vismarker(vp) ||
vp->v_type == VNON || vp->v_writecount == 0 ||
(vp->v_iflag & (VI_XLOCK | VI_CLEAN)) != 0) {
mutex_exit(vp->v_interlock);
continue;
}
mutex_exit(&mntvnode_lock);
if (vget(vp, LK_EXCLUSIVE)) {
mutex_enter(&mntvnode_lock);
(void)vunmark(mvp);
goto again;
}
if ((error = getinoquota(VTOI(vp))) != 0) {
vput(vp);
mutex_enter(&mntvnode_lock);
(void)vunmark(mvp);
break;
}
vput(vp);
mutex_enter(&mntvnode_lock);
}
mutex_exit(&mntvnode_lock);
vnfree(mvp);
mutex_enter(&dqlock);
ump->umq1_qflags[type] &= ~QTF_OPENING;
cv_broadcast(&dqcv);
if (error == 0)
ump->um_flags |= UFS_QUOTA;
mutex_exit(&dqlock);
if (error)
quota1_handle_cmd_quotaoff(l, ump, type);
return (error);
}
/*
* turn off disk quotas for a filesystem.
*/
int
quota1_handle_cmd_quotaoff(struct lwp *l, struct ufsmount *ump, int type)
{
struct mount *mp = ump->um_mountp;
struct vnode *vp;
struct vnode *qvp, *mvp;
struct dquot *dq;
struct inode *ip;
kauth_cred_t cred;
int i, error;
/* Allocate a marker vnode. */
mvp = vnalloc(mp);
mutex_enter(&dqlock);
while ((ump->umq1_qflags[type] & (QTF_CLOSING | QTF_OPENING)) != 0)
cv_wait(&dqcv, &dqlock);
if ((qvp = ump->um_quotas[type]) == NULLVP) {
mutex_exit(&dqlock);
vnfree(mvp);
return (0);
}
ump->umq1_qflags[type] |= QTF_CLOSING;
ump->um_flags &= ~UFS_QUOTA;
mutex_exit(&dqlock);
/*
* Search vnodes associated with this mount point,
* deleting any references to quota file being closed.
*/
mutex_enter(&mntvnode_lock);
again:
for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) {
vmark(mvp, vp);
mutex_enter(vp->v_interlock);
if (VTOI(vp) == NULL || vp->v_mount != mp || vismarker(vp) ||
vp->v_type == VNON ||
(vp->v_iflag & (VI_XLOCK | VI_CLEAN)) != 0) {
mutex_exit(vp->v_interlock);
continue;
}
mutex_exit(&mntvnode_lock);
if (vget(vp, LK_EXCLUSIVE)) {
mutex_enter(&mntvnode_lock);
(void)vunmark(mvp);
goto again;
}
ip = VTOI(vp);
dq = ip->i_dquot[type];
ip->i_dquot[type] = NODQUOT;
dqrele(vp, dq);
vput(vp);
mutex_enter(&mntvnode_lock);
}
mutex_exit(&mntvnode_lock);
#ifdef DIAGNOSTIC
dqflush(qvp);
#endif
qvp->v_vflag &= ~VV_SYSTEM;
error = vn_close(qvp, FREAD|FWRITE, l->l_cred);
mutex_enter(&dqlock);
ump->um_quotas[type] = NULLVP;
cred = ump->um_cred[type];
ump->um_cred[type] = NOCRED;
for (i = 0; i < MAXQUOTAS; i++)
if (ump->um_quotas[i] != NULLVP)
break;
ump->umq1_qflags[type] &= ~QTF_CLOSING;
cv_broadcast(&dqcv);
mutex_exit(&dqlock);
kauth_cred_free(cred);
if (i == MAXQUOTAS)
mp->mnt_flag &= ~MNT_QUOTA;
return (error);
}
int
quota1_handle_cmd_get(struct ufsmount *ump, const struct quotakey *qk,
struct quotaval *qv)
{
struct dquot *dq;
int error;
struct quotaval blocks, files;
int idtype;
id_t id;
idtype = qk->qk_idtype;
id = qk->qk_id;
if (ump->um_quotas[idtype] == NULLVP)
return ENODEV;
if (id == QUOTA_DEFAULTID) { /* we want the grace period of id 0 */
if ((error = dqget(NULLVP, 0, ump, idtype, &dq)) != 0)
return error;
} else {
if ((error = dqget(NULLVP, id, ump, idtype, &dq)) != 0)
return error;
}
dqblk_to_quotavals(&dq->dq_un.dq1_dqb, &blocks, &files);
dqrele(NULLVP, dq);
if (id == QUOTA_DEFAULTID) {
if (blocks.qv_expiretime > 0)
blocks.qv_grace = blocks.qv_expiretime;
else
blocks.qv_grace = MAX_DQ_TIME;
if (files.qv_expiretime > 0)
files.qv_grace = files.qv_expiretime;
else
files.qv_grace = MAX_DQ_TIME;
}
switch (qk->qk_objtype) {
case QUOTA_OBJTYPE_BLOCKS:
*qv = blocks;
break;
case QUOTA_OBJTYPE_FILES:
*qv = files;
break;
default:
return EINVAL;
}
return 0;
}
static uint32_t
quota1_encode_limit(uint64_t lim)
{
if (lim == QUOTA_NOLIMIT || lim >= 0xffffffff) {
return 0;
}
return lim;
}
int
quota1_handle_cmd_put(struct ufsmount *ump, const struct quotakey *key,
const struct quotaval *val)
{
struct dquot *dq;
struct dqblk dqb;
int error;
switch (key->qk_idtype) {
case QUOTA_IDTYPE_USER:
case QUOTA_IDTYPE_GROUP:
break;
default:
return EINVAL;
}
switch (key->qk_objtype) {
case QUOTA_OBJTYPE_BLOCKS:
case QUOTA_OBJTYPE_FILES:
break;
default:
return EINVAL;
}
if (ump->um_quotas[key->qk_idtype] == NULLVP)
return ENODEV;
if (key->qk_id == QUOTA_DEFAULTID) {
/* just update grace times */
id_t id = 0;
if ((error = dqget(NULLVP, id, ump, key->qk_idtype, &dq)) != 0)
return error;
mutex_enter(&dq->dq_interlock);
if (val->qv_grace != QUOTA_NOTIME) {
if (key->qk_objtype == QUOTA_OBJTYPE_BLOCKS)
ump->umq1_btime[key->qk_idtype] = dq->dq_btime =
val->qv_grace;
if (key->qk_objtype == QUOTA_OBJTYPE_FILES)
ump->umq1_itime[key->qk_idtype] = dq->dq_itime =
val->qv_grace;
}
dq->dq_flags |= DQ_MOD;
mutex_exit(&dq->dq_interlock);
dqrele(NULLVP, dq);
return 0;
}
if ((error = dqget(NULLVP, key->qk_id, ump, key->qk_idtype, &dq)) != 0)
return (error);
mutex_enter(&dq->dq_interlock);
/*
* Copy all but the current values.
* Reset time limit if previously had no soft limit or were
* under it, but now have a soft limit and are over it.
*/
dqb.dqb_curblocks = dq->dq_curblocks;
dqb.dqb_curinodes = dq->dq_curinodes;
dqb.dqb_btime = dq->dq_btime;
dqb.dqb_itime = dq->dq_itime;
if (key->qk_objtype == QUOTA_OBJTYPE_BLOCKS) {
dqb.dqb_bsoftlimit = quota1_encode_limit(val->qv_softlimit);
dqb.dqb_bhardlimit = quota1_encode_limit(val->qv_hardlimit);
dqb.dqb_isoftlimit = dq->dq_isoftlimit;
dqb.dqb_ihardlimit = dq->dq_ihardlimit;
} else {
KASSERT(key->qk_objtype == QUOTA_OBJTYPE_FILES);
dqb.dqb_bsoftlimit = dq->dq_bsoftlimit;
dqb.dqb_bhardlimit = dq->dq_bhardlimit;
dqb.dqb_isoftlimit = quota1_encode_limit(val->qv_softlimit);
dqb.dqb_ihardlimit = quota1_encode_limit(val->qv_hardlimit);
}
if (dq->dq_id == 0 && val->qv_grace != QUOTA_NOTIME) {
/* also update grace time if available */
if (key->qk_objtype == QUOTA_OBJTYPE_BLOCKS) {
ump->umq1_btime[key->qk_idtype] = dqb.dqb_btime =
val->qv_grace;
}
if (key->qk_objtype == QUOTA_OBJTYPE_FILES) {
ump->umq1_itime[key->qk_idtype] = dqb.dqb_itime =
val->qv_grace;
}
}
if (dqb.dqb_bsoftlimit &&
dq->dq_curblocks >= dqb.dqb_bsoftlimit &&
(dq->dq_bsoftlimit == 0 || dq->dq_curblocks < dq->dq_bsoftlimit))
dqb.dqb_btime = time_second + ump->umq1_btime[key->qk_idtype];
if (dqb.dqb_isoftlimit &&
dq->dq_curinodes >= dqb.dqb_isoftlimit &&
(dq->dq_isoftlimit == 0 || dq->dq_curinodes < dq->dq_isoftlimit))
dqb.dqb_itime = time_second + ump->umq1_itime[key->qk_idtype];
dq->dq_un.dq1_dqb = dqb;
if (dq->dq_curblocks < dq->dq_bsoftlimit)
dq->dq_flags &= ~DQ_WARN(QL_BLOCK);
if (dq->dq_curinodes < dq->dq_isoftlimit)
dq->dq_flags &= ~DQ_WARN(QL_FILE);
if (dq->dq_isoftlimit == 0 && dq->dq_bsoftlimit == 0 &&
dq->dq_ihardlimit == 0 && dq->dq_bhardlimit == 0)
dq->dq_flags |= DQ_FAKE;
else
dq->dq_flags &= ~DQ_FAKE;
dq->dq_flags |= DQ_MOD;
mutex_exit(&dq->dq_interlock);
dqrele(NULLVP, dq);
return (0);
}
#if 0
/*
* Q_SETQUOTA - assign an entire dqblk structure.
*/
int
setquota1(struct mount *mp, u_long id, int type, struct dqblk *dqb)
{
struct dquot *dq;
struct dquot *ndq;
struct ufsmount *ump = VFSTOUFS(mp);
if ((error = dqget(NULLVP, id, ump, type, &ndq)) != 0)
return (error);
dq = ndq;
mutex_enter(&dq->dq_interlock);
/*
* Copy all but the current values.
* Reset time limit if previously had no soft limit or were
* under it, but now have a soft limit and are over it.
*/
dqb->dqb_curblocks = dq->dq_curblocks;
dqb->dqb_curinodes = dq->dq_curinodes;
if (dq->dq_id != 0) {
dqb->dqb_btime = dq->dq_btime;
dqb->dqb_itime = dq->dq_itime;
}
if (dqb->dqb_bsoftlimit &&
dq->dq_curblocks >= dqb->dqb_bsoftlimit &&
(dq->dq_bsoftlimit == 0 || dq->dq_curblocks < dq->dq_bsoftlimit))
dqb->dqb_btime = time_second + ump->umq1_btime[type];
if (dqb->dqb_isoftlimit &&
dq->dq_curinodes >= dqb->dqb_isoftlimit &&
(dq->dq_isoftlimit == 0 || dq->dq_curinodes < dq->dq_isoftlimit))
dqb->dqb_itime = time_second + ump->umq1_itime[type];
dq->dq_un.dq1_dqb = *dqb;
if (dq->dq_curblocks < dq->dq_bsoftlimit)
dq->dq_flags &= ~DQ_WARN(QL_BLOCK);
if (dq->dq_curinodes < dq->dq_isoftlimit)
dq->dq_flags &= ~DQ_WARN(QL_FILE);
if (dq->dq_isoftlimit == 0 && dq->dq_bsoftlimit == 0 &&
dq->dq_ihardlimit == 0 && dq->dq_bhardlimit == 0)
dq->dq_flags |= DQ_FAKE;
else
dq->dq_flags &= ~DQ_FAKE;
dq->dq_flags |= DQ_MOD;
mutex_exit(&dq->dq_interlock);
dqrele(NULLVP, dq);
return (0);
}
/*
* Q_SETUSE - set current inode and block usage.
*/
int
setuse(struct mount *mp, u_long id, int type, void *addr)
{
struct dquot *dq;
struct ufsmount *ump = VFSTOUFS(mp);
struct dquot *ndq;
struct dqblk usage;
int error;
error = copyin(addr, (void *)&usage, sizeof (struct dqblk));
if (error)
return (error);
if ((error = dqget(NULLVP, id, ump, type, &ndq)) != 0)
return (error);
dq = ndq;
mutex_enter(&dq->dq_interlock);
/*
* Reset time limit if have a soft limit and were
* previously under it, but are now over it.
*/
if (dq->dq_bsoftlimit && dq->dq_curblocks < dq->dq_bsoftlimit &&
usage.dqb_curblocks >= dq->dq_bsoftlimit)
dq->dq_btime = time_second + ump->umq1_btime[type];
if (dq->dq_isoftlimit && dq->dq_curinodes < dq->dq_isoftlimit &&
usage.dqb_curinodes >= dq->dq_isoftlimit)
dq->dq_itime = time_second + ump->umq1_itime[type];
dq->dq_curblocks = usage.dqb_curblocks;
dq->dq_curinodes = usage.dqb_curinodes;
if (dq->dq_curblocks < dq->dq_bsoftlimit)
dq->dq_flags &= ~DQ_WARN(QL_BLOCK);
if (dq->dq_curinodes < dq->dq_isoftlimit)
dq->dq_flags &= ~DQ_WARN(QL_FILE);
dq->dq_flags |= DQ_MOD;
mutex_exit(&dq->dq_interlock);
dqrele(NULLVP, dq);
return (0);
}
#endif
/*
* Q_SYNC - sync quota files to disk.
*/
int
q1sync(struct mount *mp)
{
struct ufsmount *ump = VFSTOUFS(mp);
struct vnode *vp, *mvp;
struct dquot *dq;
int i, error;
/*
* Check if the mount point has any quotas.
* If not, simply return.
*/
for (i = 0; i < MAXQUOTAS; i++)
if (ump->um_quotas[i] != NULLVP)
break;
if (i == MAXQUOTAS)
return (0);
/* Allocate a marker vnode. */
mvp = vnalloc(mp);
/*
* Search vnodes associated with this mount point,
* synchronizing any modified dquot structures.
*/
mutex_enter(&mntvnode_lock);
again:
for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) {
vmark(mvp, vp);
mutex_enter(vp->v_interlock);
if (VTOI(vp) == NULL || vp->v_mount != mp || vismarker(vp) ||
vp->v_type == VNON ||
(vp->v_iflag & (VI_XLOCK | VI_CLEAN)) != 0) {
mutex_exit(vp->v_interlock);
continue;
}
mutex_exit(&mntvnode_lock);
error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT);
if (error) {
mutex_enter(&mntvnode_lock);
if (error == ENOENT) {
(void)vunmark(mvp);
goto again;
}
continue;
}
for (i = 0; i < MAXQUOTAS; i++) {
dq = VTOI(vp)->i_dquot[i];
if (dq == NODQUOT)
continue;
mutex_enter(&dq->dq_interlock);
if (dq->dq_flags & DQ_MOD)
dq1sync(vp, dq);
mutex_exit(&dq->dq_interlock);
}
vput(vp);
mutex_enter(&mntvnode_lock);
}
mutex_exit(&mntvnode_lock);
vnfree(mvp);
return (0);
}
/*
* Obtain a dquot structure for the specified identifier and quota file
* reading the information from the file if necessary.
*/
int
dq1get(struct vnode *dqvp, u_long id, struct ufsmount *ump, int type,
struct dquot *dq)
{
struct iovec aiov;
struct uio auio;
int error;
KASSERT(mutex_owned(&dq->dq_interlock));
vn_lock(dqvp, LK_EXCLUSIVE | LK_RETRY);
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
aiov.iov_base = (void *)&dq->dq_un.dq1_dqb;
aiov.iov_len = sizeof (struct dqblk);
auio.uio_resid = sizeof (struct dqblk);
auio.uio_offset = (off_t)(id * sizeof (struct dqblk));
auio.uio_rw = UIO_READ;
UIO_SETUP_SYSSPACE(&auio);
error = VOP_READ(dqvp, &auio, 0, ump->um_cred[type]);
if (auio.uio_resid == sizeof(struct dqblk) && error == 0)
memset((void *)&dq->dq_un.dq1_dqb, 0, sizeof(struct dqblk));
VOP_UNLOCK(dqvp);
/*
* I/O error in reading quota file, release
* quota structure and reflect problem to caller.
*/
if (error)
return (error);
/*
* Check for no limit to enforce.
* Initialize time values if necessary.
*/
if (dq->dq_isoftlimit == 0 && dq->dq_bsoftlimit == 0 &&
dq->dq_ihardlimit == 0 && dq->dq_bhardlimit == 0)
dq->dq_flags |= DQ_FAKE;
if (dq->dq_id != 0) {
if (dq->dq_btime == 0)
dq->dq_btime = time_second + ump->umq1_btime[type];
if (dq->dq_itime == 0)
dq->dq_itime = time_second + ump->umq1_itime[type];
}
return (0);
}
/*
* Update the disk quota in the quota file.
*/
int
dq1sync(struct vnode *vp, struct dquot *dq)
{
struct vnode *dqvp;
struct iovec aiov;
struct uio auio;
int error;
if (dq == NODQUOT)
panic("dq1sync: dquot");
KASSERT(mutex_owned(&dq->dq_interlock));
if ((dq->dq_flags & DQ_MOD) == 0)
return (0);
if ((dqvp = dq->dq_ump->um_quotas[dq->dq_type]) == NULLVP)
panic("dq1sync: file");
KASSERT(dqvp != vp);
vn_lock(dqvp, LK_EXCLUSIVE | LK_RETRY);
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
aiov.iov_base = (void *)&dq->dq_un.dq1_dqb;
aiov.iov_len = sizeof (struct dqblk);
auio.uio_resid = sizeof (struct dqblk);
auio.uio_offset = (off_t)(dq->dq_id * sizeof (struct dqblk));
auio.uio_rw = UIO_WRITE;
UIO_SETUP_SYSSPACE(&auio);
error = VOP_WRITE(dqvp, &auio, 0, dq->dq_ump->um_cred[dq->dq_type]);
if (auio.uio_resid && error == 0)
error = EIO;
dq->dq_flags &= ~DQ_MOD;
VOP_UNLOCK(dqvp);
return (error);
}
Reference in a new issue View git blame Copy permalink