/*
* Flush out all the files in a filesystem.
*/
int
ffs_flushfiles(struct mount *mp, int flags, struct proc *p)
{
struct ufsmount *ump;
int error;
ump = VFSTOUFS(mp);
if (mp->mnt_flag & MNT_QUOTA) {
int i;
if ((error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) != 0)
return (error);
for (i = 0; i < MAXQUOTAS; i++) {
if (ump->um_quotas[i] == NULLVP)
continue;
quotaoff(p, mp, i);
}
/*
* Here we fall through to vflush again to ensure
* that we have gotten rid of all the system vnodes.
*/
}
/*
* Flush all the files.
*/
if ((error = vflush(mp, NULL, flags)) != 0)
return (error);
/*
* Flush filesystem metadata.
*/
vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, p);
error = VOP_FSYNC(ump->um_devvp, p->p_ucred, MNT_WAIT, p);
VOP_UNLOCK(ump->um_devvp, 0, p);
return (error);
}
static int
off_f(
int argc,
char **argv)
{
int c, flags = 0, qflags = 0, type = 0;
while ((c = getopt(argc, argv, "gpuv")) != EOF) {
switch (c) {
case 'g':
type |= XFS_GROUP_QUOTA;
qflags |= XFS_QUOTA_GDQ_ACCT | XFS_QUOTA_GDQ_ENFD;
break;
case 'p':
type |= XFS_PROJ_QUOTA;
qflags |= XFS_QUOTA_PDQ_ACCT | XFS_QUOTA_PDQ_ENFD;
break;
case 'u':
type |= XFS_USER_QUOTA;
qflags |= XFS_QUOTA_UDQ_ACCT | XFS_QUOTA_UDQ_ENFD;
break;
case 'v':
flags |= VERBOSE_FLAG;
break;
default:
return command_usage(&off_cmd);
}
}
if (argc != optind)
return command_usage(&off_cmd);
if (!type) {
type |= XFS_USER_QUOTA;
qflags |= XFS_QUOTA_UDQ_ACCT | XFS_QUOTA_UDQ_ENFD;
}
if (fs_path->fs_flags & FS_MOUNT_POINT)
quotaoff(fs_path->fs_dir, type, qflags, flags);
return 0;
}
/*
* Q_QUOTAON - set up a quota file for a particular file system.
*/
int
quotaon(struct lwp *l, struct mount *mp, int type, void *fname)
{
struct ufsmount *ump = VFSTOUFS(mp);
struct vnode *vp, **vpp, *mvp;
struct dquot *dq;
int error;
struct nameidata nd;
/* XXX XXX XXX */
if (mp->mnt_wapbl != NULL) {
printf("%s: quotas cannot yet be used with -o log\n",
mp->mnt_stat.f_mntonname);
return (EOPNOTSUPP);
}
vpp = &ump->um_quotas[type];
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, fname);
if ((error = vn_open(&nd, FREAD|FWRITE, 0)) != 0)
return (error);
vp = nd.ni_vp;
VOP_UNLOCK(vp, 0);
if (vp->v_type != VREG) {
(void) vn_close(vp, FREAD|FWRITE, l->l_cred);
return (EACCES);
}
if (*vpp != vp)
quotaoff(l, mp, type);
mutex_enter(&dqlock);
while ((ump->um_qflags[type] & (QTF_CLOSING | QTF_OPENING)) != 0)
cv_wait(&dqcv, &dqlock);
ump->um_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->um_btime[type] = MAX_DQ_TIME;
ump->um_itime[type] = MAX_IQ_TIME;
if (dqget(NULLVP, 0, ump, type, &dq) == 0) {
if (dq->dq_btime > 0)
ump->um_btime[type] = dq->dq_btime;
if (dq->dq_itime > 0)
ump->um_itime[type] = dq->dq_itime;
dqrele(NULLVP, dq);
}
/* Allocate a marker vnode. */
if ((mvp = vnalloc(mp)) == NULL) {
error = ENOMEM;
goto out;
}
/*
* 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 | LK_INTERLOCK)) {
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);
out:
mutex_enter(&dqlock);
ump->um_qflags[type] &= ~QTF_OPENING;
cv_broadcast(&dqcv);
mutex_exit(&dqlock);
if (error)
quotaoff(l, mp, type);
return (error);
}
/*
* Do operations associated with quotas
*/
int
ufs_quotactl(struct mount *mp, int cmds, uid_t uid, void *arg)
{
struct lwp *l = curlwp;
#ifndef QUOTA
(void) mp;
(void) cmds;
(void) uid;
(void) arg;
(void) l;
return (EOPNOTSUPP);
#else
int cmd, type, error;
if (uid == -1)
uid = kauth_cred_getuid(l->l_cred);
cmd = cmds >> SUBCMDSHIFT;
switch (cmd) {
case Q_SYNC:
break;
case Q_GETQUOTA:
if (uid == kauth_cred_getuid(l->l_cred))
break;
/* fall through */
default:
if ((error = kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER,
NULL)) != 0)
return (error);
}
type = cmds & SUBCMDMASK;
if ((u_int)type >= MAXQUOTAS)
return (EINVAL);
error = vfs_busy(mp, NULL);
if (error != 0)
return (error);
mutex_enter(&mp->mnt_updating);
switch (cmd) {
case Q_QUOTAON:
error = quotaon(l, mp, type, arg);
break;
case Q_QUOTAOFF:
error = quotaoff(l, mp, type);
break;
case Q_SETQUOTA:
error = setquota(mp, uid, type, arg);
break;
case Q_SETUSE:
error = setuse(mp, uid, type, arg);
break;
case Q_GETQUOTA:
error = getquota(mp, uid, type, arg);
break;
case Q_SYNC:
error = qsync(mp);
break;
default:
error = EINVAL;
}
mutex_exit(&mp->mnt_updating);
vfs_unbusy(mp, false, NULL);
return (error);
#endif
}
