/*
* The nbmand mount option can be changed at mount time.
* We can't allow it to be toggled on live file systems or incorrect
* behavior may be seen from cifs clients
*
* This property isn't registered via dsl_prop_register(), but this callback
* will be called when a file system is first mounted
*/
static void
nbmand_changed_cb(void *arg, uint64_t newval)
{
zfsvfs_t *zfsvfs = arg;
if (newval == FALSE) {
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND, NULL, 0);
} else {
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND, NULL, 0);
}
}
static void
exec_changed_cb(void *arg, uint64_t newval)
{
zfsvfs_t *zfsvfs = arg;
if (newval == FALSE) {
zfsvfs->z_vfs->vfs_flag |= VFS_NOEXEC;
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_EXEC);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC, NULL, 0);
} else {
zfsvfs->z_vfs->vfs_flag &= ~VFS_NOEXEC;
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_EXEC, NULL, 0);
}
}
static void
setuid_changed_cb(void *arg, uint64_t newval)
{
zfsvfs_t *zfsvfs = arg;
if (newval == FALSE) {
zfsvfs->z_vfs->vfs_flag |= VFS_NOSETUID;
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_SETUID);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID, NULL, 0);
} else {
zfsvfs->z_vfs->vfs_flag &= ~VFS_NOSETUID;
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_SETUID, NULL, 0);
}
}
static void
devices_changed_cb(void *arg, uint64_t newval)
{
zfsvfs_t *zfsvfs = arg;
if (newval == FALSE) {
zfsvfs->z_vfs->vfs_flag |= VFS_NODEVICES;
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_DEVICES);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NODEVICES, NULL, 0);
} else {
zfsvfs->z_vfs->vfs_flag &= ~VFS_NODEVICES;
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NODEVICES);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_DEVICES, NULL, 0);
}
}
static void
atime_changed_cb(void *arg, uint64_t newval)
{
zfsvfs_t *zfsvfs = arg;
if (newval == TRUE) {
zfsvfs->z_atime = TRUE;
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_ATIME, NULL, 0);
} else {
zfsvfs->z_atime = FALSE;
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_ATIME);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME, NULL, 0);
}
}
static void
readonly_changed_cb(void *arg, uint64_t newval)
{
zfsvfs_t *zfsvfs = arg;
if (newval) {
/* XXX locking on vfs_flag? */
zfsvfs->z_vfs->vfs_flag |= VFS_RDONLY;
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RW);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RO, NULL, 0);
} else {
/* XXX locking on vfs_flag? */
zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY;
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RO);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RW, NULL, 0);
}
}
static void
xattr_changed_cb(void *arg, uint64_t newval)
{
zfsvfs_t *zfsvfs = arg;
if (newval == TRUE) {
/* XXX locking on vfs_flag? */
#ifdef TODO
zfsvfs->z_vfs->vfs_flag |= VFS_XATTR;
#endif
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_XATTR, NULL, 0);
} else {
/* XXX locking on vfs_flag? */
#ifdef TODO
zfsvfs->z_vfs->vfs_flag &= ~VFS_XATTR;
#endif
vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_XATTR);
vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR, NULL, 0);
}
}
/*
* Close off disk quotas for a file system.
*/
int
closedq(struct ufsvfs *ufsvfsp, struct cred *cr)
{
struct inode *qip;
if (secpolicy_fs_quota(cr, ufsvfsp->vfs_vfs) != 0)
return (EPERM);
rw_enter(&ufsvfsp->vfs_dqrwlock, RW_WRITER);
/*
* Quotas are not enabled on this file system so there is
* nothing more to do.
*/
if ((ufsvfsp->vfs_qflags & MQ_ENABLED) == 0) {
rw_exit(&ufsvfsp->vfs_dqrwlock);
return (0);
}
/*
* At this point, the quota subsystem is quiescent on this file
* system so we can do all the work necessary to dismantle the
* quota stuff.
*/
qip = ufsvfsp->vfs_qinod;
if (!qip)
return (ufs_fault(ufsvfsp->vfs_root, "closedq: NULL qip"));
ufsvfsp->vfs_qflags = 0; /* disable quotas */
vfs_setmntopt(ufsvfsp->vfs_vfs, MNTOPT_NOQUOTA, NULL, 0);
/*
* ufs_scan_inodes() depends on vfs_qinod, so we can't
* clear it until afterwards.
*/
(void) ufs_scan_inodes(0, closedq_scan_inode, ufsvfsp, ufsvfsp);
ufsvfsp->vfs_qinod = NULL;
rw_exit(&ufsvfsp->vfs_dqrwlock);
/*
* Sync and release the quota file inode. Since we have a private
* pointer to the quota inode and vfs_qinod is now clear we do not
* need to hold vfs_dqrwlock.
*/
(void) TRANS_SYNCIP(qip, 0, I_SYNC, TOP_SYNCIP_CLOSEDQ);
VN_RELE(ITOV(qip));
return (0);
}
/*ARGSUSED*/
static int
lo_mount(struct vfs *vfsp,
struct vnode *vp,
struct mounta *uap,
struct cred *cr)
{
int error;
struct vnode *srootvp = NULL; /* the server's root */
struct vnode *realrootvp;
struct loinfo *li;
int nodev;
nodev = vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL);
if ((error = secpolicy_fs_mount(cr, vp, vfsp)) != 0)
return (EPERM);
/*
* Loopback devices which get "nodevices" added can be done without
* "nodevices" set because we cannot import devices into a zone
* with loopback. Note that we have all zone privileges when
* this happens; if not, we'd have gotten "nosuid".
*/
if (!nodev && vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL))
vfs_setmntopt(vfsp, MNTOPT_DEVICES, NULL, VFS_NODISPLAY);
mutex_enter(&vp->v_lock);
if (!(uap->flags & MS_OVERLAY) &&
(vp->v_count != 1 || (vp->v_flag & VROOT))) {
mutex_exit(&vp->v_lock);
return (EBUSY);
}
mutex_exit(&vp->v_lock);
/*
* Find real root, and make vfs point to real vfs
*/
if (error = lookupname(uap->spec, (uap->flags & MS_SYSSPACE) ?
UIO_SYSSPACE : UIO_USERSPACE, FOLLOW, NULLVPP, &realrootvp))
return (error);
/*
* Enforce MAC policy if needed.
*
* Loopback mounts must not allow writing up. The dominance test
* is intended to prevent a global zone caller from accidentally
* creating write-up conditions between two labeled zones.
* Local zones can't violate MAC on their own without help from
* the global zone because they can't name a pathname that
* they don't already have.
*
* The special case check for the NET_MAC_AWARE process flag is
* to support the case of the automounter in the global zone. We
* permit automounting of local zone directories such as home
* directories, into the global zone as required by setlabel,
* zonecopy, and saving of desktop sessions. Such mounts are
* trusted not to expose the contents of one zone's directories
* to another by leaking them through the global zone.
*/
if (is_system_labeled() && crgetzoneid(cr) == GLOBAL_ZONEID) {
char specname[MAXPATHLEN];
zone_t *from_zptr;
zone_t *to_zptr;
if (vnodetopath(NULL, realrootvp, specname,
sizeof (specname), CRED()) != 0) {
VN_RELE(realrootvp);
return (EACCES);
}
from_zptr = zone_find_by_path(specname);
to_zptr = zone_find_by_path(refstr_value(vfsp->vfs_mntpt));
/*
* Special case for zone devfs: the zone for /dev will
* incorrectly appear as the global zone since it's not
* under the zone rootpath. So for zone devfs check allow
* read-write mounts.
*
* Second special case for scratch zones used for Live Upgrade:
* this is used to mount the zone's root from /root to /a in
* the scratch zone. As with the other special case, this
* appears to be outside of the zone because it's not under
* the zone rootpath, which is $ZONEPATH/lu in the scratch
* zone case.
*/
if (from_zptr != to_zptr &&
!(to_zptr->zone_flags & ZF_IS_SCRATCH)) {
/*
* We know at this point that the labels aren't equal
* because the zone pointers aren't equal, and zones
* can't share a label.
*
* If the source is the global zone then making
* it available to a local zone must be done in
* read-only mode as the label will become admin_low.
*
* If it is a mount between local zones then if
* the current process is in the global zone and has
* the NET_MAC_AWARE flag, then regular read-write
* access is allowed. If it's in some other zone, but
* the label on the mount point dominates the original
* source, then allow the mount as read-only
* ("read-down").
*/
if (from_zptr->zone_id == GLOBAL_ZONEID) {
/* make the mount read-only */
vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0);
} else { /* cross-zone mount */
if (to_zptr->zone_id == GLOBAL_ZONEID &&
/* LINTED: no consequent */
getpflags(NET_MAC_AWARE, cr) != 0) {
/* Allow the mount as read-write */
} else if (bldominates(
label2bslabel(to_zptr->zone_slabel),
label2bslabel(from_zptr->zone_slabel))) {
/* make the mount read-only */
vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0);
} else {
VN_RELE(realrootvp);
zone_rele(to_zptr);
zone_rele(from_zptr);
return (EACCES);
}
}
}
zone_rele(to_zptr);
zone_rele(from_zptr);
}
/*
* realrootvp may be an AUTOFS node, in which case we
* perform a VOP_ACCESS() to trigger the mount of the
* intended filesystem, so we loopback mount the intended
* filesystem instead of the AUTOFS filesystem.
*/
(void) VOP_ACCESS(realrootvp, 0, 0, cr, NULL);
/*
* We're interested in the top most filesystem.
* This is specially important when uap->spec is a trigger
* AUTOFS node, since we're really interested in mounting the
* filesystem AUTOFS mounted as result of the VOP_ACCESS()
* call not the AUTOFS node itself.
*/
if (vn_mountedvfs(realrootvp) != NULL) {
if (error = traverse(&realrootvp)) {
VN_RELE(realrootvp);
return (error);
}
}
/*
* Allocate a vfs info struct and attach it
*/
li = kmem_zalloc(sizeof (struct loinfo), KM_SLEEP);
li->li_realvfs = realrootvp->v_vfsp;
li->li_mountvfs = vfsp;
/*
* Set mount flags to be inherited by loopback vfs's
*/
if (vfs_optionisset(vfsp, MNTOPT_RO, NULL)) {
li->li_mflag |= VFS_RDONLY;
}
if (vfs_optionisset(vfsp, MNTOPT_NOSUID, NULL)) {
li->li_mflag |= (VFS_NOSETUID|VFS_NODEVICES);
}
if (vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL)) {
li->li_mflag |= VFS_NODEVICES;
}
if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) {
li->li_mflag |= VFS_NOSETUID;
}
/*
* Permissive flags are added to the "deny" bitmap.
*/
if (vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL)) {
li->li_dflag |= VFS_XATTR;
}
if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL)) {
li->li_dflag |= VFS_NBMAND;
}
/*
* Propagate inheritable mount flags from the real vfs.
*/
if ((li->li_realvfs->vfs_flag & VFS_RDONLY) &&
!vfs_optionisset(vfsp, MNTOPT_RO, NULL))
vfs_setmntopt(vfsp, MNTOPT_RO, NULL,
VFS_NODISPLAY);
if ((li->li_realvfs->vfs_flag & VFS_NOSETUID) &&
!vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL))
vfs_setmntopt(vfsp, MNTOPT_NOSETUID, NULL,
VFS_NODISPLAY);
if ((li->li_realvfs->vfs_flag & VFS_NODEVICES) &&
!vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL))
vfs_setmntopt(vfsp, MNTOPT_NODEVICES, NULL,
VFS_NODISPLAY);
/*
* Permissive flags such as VFS_XATTR, as opposed to restrictive flags
* such as VFS_RDONLY, are handled differently. An explicit
* MNTOPT_NOXATTR should override the underlying filesystem's VFS_XATTR.
*/
if ((li->li_realvfs->vfs_flag & VFS_XATTR) &&
!vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL) &&
!vfs_optionisset(vfsp, MNTOPT_XATTR, NULL))
vfs_setmntopt(vfsp, MNTOPT_XATTR, NULL,
VFS_NODISPLAY);
if ((li->li_realvfs->vfs_flag & VFS_NBMAND) &&
!vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL) &&
!vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL))
vfs_setmntopt(vfsp, MNTOPT_NBMAND, NULL,
VFS_NODISPLAY);
li->li_refct = 0;
vfsp->vfs_data = (caddr_t)li;
vfsp->vfs_bcount = 0;
vfsp->vfs_fstype = lofsfstype;
vfsp->vfs_bsize = li->li_realvfs->vfs_bsize;
vfsp->vfs_dev = li->li_realvfs->vfs_dev;
vfsp->vfs_fsid.val[0] = li->li_realvfs->vfs_fsid.val[0];
vfsp->vfs_fsid.val[1] = li->li_realvfs->vfs_fsid.val[1];
if (vfs_optionisset(vfsp, MNTOPT_LOFS_NOSUB, NULL)) {
li->li_flag |= LO_NOSUB;
}
/*
* Propagate any VFS features
*/
vfs_propagate_features(li->li_realvfs, vfsp);
/*
* Setup the hashtable. If the root of this mount isn't a directory,
* there's no point in allocating a large hashtable. A table with one
* bucket is sufficient.
*/
if (realrootvp->v_type != VDIR)
lsetup(li, 1);
else
lsetup(li, 0);
/*
* Make the root vnode
*/
srootvp = makelonode(realrootvp, li, 0);
srootvp->v_flag |= VROOT;
li->li_rootvp = srootvp;
#ifdef LODEBUG
lo_dprint(4, "lo_mount: vfs %p realvfs %p root %p realroot %p li %p\n",
vfsp, li->li_realvfs, srootvp, realrootvp, li);
#endif
return (0);
}
/*
* Enable logging
*/
int
lqfs_enable(struct vnode *vp, struct fiolog *flp, cred_t *cr)
{
int error;
inode_t *ip = VTOI(vp);
qfsvfs_t *qfsvfsp = ip->i_qfsvfs;
fs_lqfs_common_t *fs = VFS_FS_PTR(qfsvfsp);
ml_unit_t *ul;
#ifdef LQFS_TODO_LOCKFS
int reclaim = 0;
struct lockfs lf;
struct ulockfs *ulp;
#else
/* QFS doesn't really support LOCKFS. */
#endif /* LQFS_TODO_LOCKFS */
vfs_t *vfsp = qfsvfsp->vfs_vfs;
uint64_t tmp_nbytes_actual;
char fsclean;
sam_sblk_t *sblk = qfsvfsp->mi.m_sbp;
/*
* File system is not capable of logging.
*/
if (!LQFS_CAPABLE(qfsvfsp)) {
flp->error = FIOLOG_ENOTSUP;
error = 0;
goto out;
}
if (!SAM_MAGIC_V2A_OR_HIGHER(&sblk->info.sb)) {
cmn_err(CE_WARN, "SAM-QFS: %s: Not enabling logging, "
" file system is not version 2A.", qfsvfsp->mt.fi_name);
cmn_err(CE_WARN, "\tUpgrade file system with samfsck -u "
"first.");
flp->error = FIOLOG_ENOTSUP;
error = 0;
goto out;
}
if (LQFS_GET_LOGBNO(fs)) {
error = lqfs_log_validate(qfsvfsp, flp, cr);
}
/*
* Check if logging is already enabled
*/
if (LQFS_GET_LOGP(qfsvfsp)) {
flp->error = FIOLOG_ETRANS;
/* for root ensure logging option is set */
vfs_setmntopt(vfsp, MNTOPT_LOGGING, NULL, 0);
error = 0;
goto out;
}
/*
* Come back here to recheck if we had to disable the log.
*/
recheck:
error = 0;
flp->error = FIOLOG_ENONE;
/*
* Adjust requested log size
*/
flp->nbytes_actual = flp->nbytes_requested;
if (flp->nbytes_actual == 0) {
tmp_nbytes_actual =
(((uint64_t)FS_SIZE(fs)) / ldl_divisor) << FS_FSHIFT(fs);
flp->nbytes_actual = (uint_t)MIN(tmp_nbytes_actual, INT_MAX);
}
flp->nbytes_actual = MAX(flp->nbytes_actual, ldl_minlogsize);
flp->nbytes_actual = MIN(flp->nbytes_actual, ldl_maxlogsize);
flp->nbytes_actual = blkroundup(fs, flp->nbytes_actual);
/*
* logging is enabled and the log is the right size; done
*/
ul = LQFS_GET_LOGP(qfsvfsp);
if (ul && LQFS_GET_LOGBNO(fs) &&
(flp->nbytes_actual == ul->un_requestsize)) {
vfs_setmntopt(vfsp, MNTOPT_LOGGING, NULL, 0);
error = 0;
goto out;
}
/*
* Readonly file system
*/
if (FS_RDONLY(fs)) {
flp->error = FIOLOG_EROFS;
error = 0;
goto out;
}
#ifdef LQFS_TODO_LOCKFS
/*
* File system must be write locked to enable logging
*/
error = qfs_fiolfss(vp, &lf);
if (error) {
goto out;
}
if (!LOCKFS_IS_ULOCK(&lf)) {
flp->error = FIOLOG_EULOCK;
error = 0;
goto out;
}
lf.lf_lock = LOCKFS_WLOCK;
lf.lf_flags = 0;
lf.lf_comment = NULL;
error = qfs_fiolfs(vp, &lf, 1);
if (error) {
flp->error = FIOLOG_EWLOCK;
error = 0;
goto out;
}
#else
/* QFS doesn't really support lockfs. */
#endif /* LQFS_TODO_LOCKFS */
/*
* Grab appropriate locks to synchronize with the rest
* of the system
*/
vfs_lock_wait(vfsp);
#ifdef LQFS_TODO_LOCKFS
ulp = &ufsvfsp->vfs_ulockfs;
mutex_enter(&ulp->ul_lock);
#else
/* QFS doesn't really support lockfs. */
#endif /* LQFS_TODO_LOCKFS */
/*
* File system must be fairly consistent to enable logging
*/
fsclean = LQFS_GET_FS_CLEAN(fs);
if (fsclean != FSLOG &&
fsclean != FSACTIVE &&
fsclean != FSSTABLE &&
fsclean != FSCLEAN) {
flp->error = FIOLOG_ECLEAN;
goto unlockout;
}
#ifdef LUFS
/*
* A write-locked file system is only active if there are
* open deleted files; so remember to set FS_RECLAIM later.
*/
if (LQFS_GET_FS_CLEAN(fs) == FSACTIVE) {
reclaim = FS_RECLAIM;
}
#else
/* QFS doesn't have a reclaim file thread. */
#endif /* LUFS */
/*
* Logging is already enabled; must be changing the log's size
*/
if (LQFS_GET_LOGBNO(fs) && LQFS_GET_LOGP(qfsvfsp)) {
#ifdef LQFS_TODO_LOCKFS
/*
* Before we can disable logging, we must give up our
* lock. As a consequence of unlocking and disabling the
* log, the fs structure may change. Because of this, when
* disabling is complete, we will go back to recheck to
* repeat all of the checks that we performed to get to
* this point. Disabling sets fs->fs_logbno to 0, so this
* will not put us into an infinite loop.
*/
mutex_exit(&ulp->ul_lock);
#else
/* QFS doesn't really support lockfs. */
#endif /* LQFS_TODO_LOCKFS */
vfs_unlock(vfsp);
#ifdef LQFS_TODO_LOCKFS
lf.lf_lock = LOCKFS_ULOCK;
lf.lf_flags = 0;
error = qfs_fiolfs(vp, &lf, 1);
if (error) {
flp->error = FIOLOG_ENOULOCK;
error = 0;
goto out;
}
#else
/* QFS doesn't really support lockfs. */
#endif /* LQFS_TODO_LOCKFS */
error = lqfs_disable(vp, flp);
if (error || (flp->error != FIOLOG_ENONE)) {
error = 0;
goto out;
}
goto recheck;
}
error = lqfs_alloc(qfsvfsp, flp, cr);
if (error) {
goto errout;
}
#ifdef LUFS
#else
if ((error = lqfs_log_validate(qfsvfsp, flp, cr)) != 0) {
goto errout;
}
#endif /* LUFS */
/*
* Create all of the incore structs
*/
error = lqfs_snarf(qfsvfsp, fs, 0);
if (error) {
goto errout;
}
/*
* DON'T ``GOTO ERROUT'' PAST THIS POINT
*/
/*
* Pretend we were just mounted with logging enabled
* freeze and drain the file system of readers
* Get the ops vector
* If debug, record metadata locations with log subsystem
* Start the delete thread
* Start the reclaim thread, if necessary
* Thaw readers
*/
vfs_setmntopt(vfsp, MNTOPT_LOGGING, NULL, 0);
TRANS_DOMATAMAP(qfsvfsp);
TRANS_MATA_MOUNT(qfsvfsp);
TRANS_MATA_SI(qfsvfsp, fs);
#ifdef LUFS
qfs_thread_start(&qfsvfsp->vfs_delete, qfs_thread_delete, vfsp);
if (fs->fs_reclaim & (FS_RECLAIM|FS_RECLAIMING)) {
fs->fs_reclaim &= ~FS_RECLAIM;
fs->fs_reclaim |= FS_RECLAIMING;
qfs_thread_start(&qfsvfsp->vfs_reclaim,
qfs_thread_reclaim, vfsp);
} else {
fs->fs_reclaim |= reclaim;
}
#else
/* QFS doesn't have file reclaim nor i-node delete threads. */
#endif /* LUFS */
#ifdef LUFS
mutex_exit(&ulp->ul_lock);
#else
/* QFS doesn't really support LOCKFS. */
#endif /* LUFS */
vfs_unlock(vfsp);
#ifdef LQFS_TODO_LOCKFS
/*
* Unlock the file system
*/
lf.lf_lock = LOCKFS_ULOCK;
lf.lf_flags = 0;
error = qfs_fiolfs(vp, &lf, 1);
if (error) {
flp->error = FIOLOG_ENOULOCK;
error = 0;
goto out;
}
#else
/* QFS doesn't really support LOCKFS. */
#endif /* LQFS_TODO_LOCKFS */
/*
* There's nothing in the log yet (we've just allocated it)
* so directly write out the super block.
* Note, we have to force this sb out to disk
* (not just to the log) so that if we crash we know we are logging
*/
VFS_LOCK_MUTEX_ENTER(qfsvfsp);
LQFS_SET_FS_CLEAN(fs, FSLOG);
LQFS_SET_FS_ROLLED(fs, FS_NEED_ROLL); /* Mark the fs as unrolled */
#ifdef LUFS
QFS_BWRITE2(NULL, qfsvfsp->vfs_bufp);
#else
sam_update_sblk(qfsvfsp, 0, 0, TRUE);
#endif /* LUFS */
VFS_LOCK_MUTEX_EXIT(qfsvfsp);
error = 0;
goto out;
errout:
/*
* Aquire the qfs_scan_lock before de-linking the mtm data
* structure so that we keep qfs_sync() and qfs_update() away
* when they execute the ufs_scan_inodes() run while we're in
* progress of enabling/disabling logging.
*/
mutex_enter(&qfs_scan_lock);
(void) lqfs_unsnarf(qfsvfsp);
mutex_exit(&qfs_scan_lock);
(void) lqfs_free(qfsvfsp);
unlockout:
#ifdef LQFS_TODO_LOCKFS
mutex_exit(&ulp->ul_lock);
#else
/* QFS doesn't really support LOCKFS. */
#endif /* LQFS_TODO_LOCKFS */
vfs_unlock(vfsp);
#ifdef LQFS_TODO_LOCKFS
lf.lf_lock = LOCKFS_ULOCK;
lf.lf_flags = 0;
(void) qfs_fiolfs(vp, &lf, 1);
#else
/* QFS doesn't really support LOCKFS. */
#endif /* LQFS_TODO_LOCKFS */
out:
mutex_enter(&ip->mp->ms.m_waitwr_mutex);
ip->mp->mt.fi_status |= FS_LOGSTATE_KNOWN;
mutex_exit(&ip->mp->ms.m_waitwr_mutex);
return (error);
}
/*
* Disable logging
*/
int
lqfs_disable(vnode_t *vp, struct fiolog *flp)
{
int error = 0;
inode_t *ip = VTOI(vp);
qfsvfs_t *qfsvfsp = ip->i_qfsvfs;
fs_lqfs_common_t *fs = VFS_FS_PTR(qfsvfsp);
#ifdef LUFS
struct lockfs lf;
struct ulockfs *ulp;
#else
/* QFS doesn't really support LOCKFS. */
#endif /* LUFS */
flp->error = FIOLOG_ENONE;
/*
* Logging is already disabled; done
*/
if (LQFS_GET_LOGBNO(fs) == 0 || LQFS_GET_LOGP(qfsvfsp) == NULL ||
!LQFS_CAPABLE(qfsvfsp)) {
vfs_setmntopt(qfsvfsp->vfs_vfs, MNTOPT_NOLOGGING, NULL, 0);
error = 0;
goto out;
}
#ifdef LUFS
/*
* File system must be write locked to disable logging
*/
error = qfs_fiolfss(vp, &lf);
if (error) {
goto out;
}
if (!LOCKFS_IS_ULOCK(&lf)) {
flp->error = FIOLOG_EULOCK;
error = 0;
goto out;
}
lf.lf_lock = LOCKFS_WLOCK;
lf.lf_flags = 0;
lf.lf_comment = NULL;
error = qfs_fiolfs(vp, &lf, 1);
if (error) {
flp->error = FIOLOG_EWLOCK;
error = 0;
goto out;
}
#else
/* QFS doesn't really support LOCKFS. */
#endif /* LUFS */
if (LQFS_GET_LOGP(qfsvfsp) == NULL || LQFS_GET_LOGBNO(fs) == 0) {
goto errout;
}
/*
* WE ARE COMMITTED TO DISABLING LOGGING PAST THIS POINT
*/
/*
* Disable logging:
* Suspend the reclaim thread and force the delete thread to exit.
* When a nologging mount has completed there may still be
* work for reclaim to do so just suspend this thread until
* it's [deadlock-] safe for it to continue. The delete
* thread won't be needed as qfs_iinactive() calls
* qfs_delete() when logging is disabled.
* Freeze and drain reader ops.
* Commit any outstanding reader transactions (lqfs_flush).
* Set the ``unmounted'' bit in the qfstrans struct.
* If debug, remove metadata from matamap.
* Disable matamap processing.
* NULL the trans ops table.
* Free all of the incore structs related to logging.
* Allow reader ops.
*/
#ifdef LUFS
qfs_thread_suspend(&qfsvfsp->vfs_reclaim);
qfs_thread_exit(&qfsvfsp->vfs_delete);
#else
/* QFS doesn't have file reclaim nor i-node delete threads. */
#endif /* LUFS */
vfs_lock_wait(qfsvfsp->vfs_vfs);
#ifdef LQFS_TODO_LOCKFS
ulp = &qfsvfsp->vfs_ulockfs;
mutex_enter(&ulp->ul_lock);
(void) qfs_quiesce(ulp);
#else
/* QFS doesn't really support LOCKFS. */
#endif /* LQFS_TODO_LOCKFS */
#ifdef LQFS_TODO
(void) qfs_flush(qfsvfsp->vfs_vfs);
#else
(void) lqfs_flush(qfsvfsp);
if (LQFS_GET_LOGP(qfsvfsp)) {
logmap_start_roll(LQFS_GET_LOGP(qfsvfsp));
}
#endif /* LQFS_TODO */
TRANS_MATA_UMOUNT(qfsvfsp);
LQFS_SET_DOMATAMAP(qfsvfsp, 0);
/*
* Free all of the incore structs
* Aquire the ufs_scan_lock before de-linking the mtm data
* structure so that we keep ufs_sync() and ufs_update() away
* when they execute the ufs_scan_inodes() run while we're in
* progress of enabling/disabling logging.
*/
mutex_enter(&qfs_scan_lock);
(void) lqfs_unsnarf(qfsvfsp);
mutex_exit(&qfs_scan_lock);
#ifdef LQFS_TODO_LOCKFS
atomic_add_long(&ufs_quiesce_pend, -1);
mutex_exit(&ulp->ul_lock);
#else
/* QFS doesn't do this yet. */
#endif /* LQFS_TODO_LOCKFS */
vfs_setmntopt(qfsvfsp->vfs_vfs, MNTOPT_NOLOGGING, NULL, 0);
vfs_unlock(qfsvfsp->vfs_vfs);
LQFS_SET_FS_ROLLED(fs, FS_ALL_ROLLED);
LQFS_SET_NOLOG_SI(qfsvfsp, 0);
/*
* Free the log space and mark the superblock as FSACTIVE
*/
(void) lqfs_free(qfsvfsp);
#ifdef LUFS
/*
* Allow the reclaim thread to continue.
*/
qfs_thread_continue(&qfsvfsp->vfs_reclaim);
#else
/* QFS doesn't have a file reclaim thread. */
#endif /* LUFS */
#ifdef LQFS_TODO_LOCKFS
/*
* Unlock the file system
*/
lf.lf_lock = LOCKFS_ULOCK;
lf.lf_flags = 0;
error = qfs_fiolfs(vp, &lf, 1);
if (error) {
flp->error = FIOLOG_ENOULOCK;
}
#else
/* QFS doesn't really support LOCKFS. */
#endif /* LQFS_LOCKFS */
error = 0;
goto out;
errout:
#ifdef LQFS_LOCKFS
lf.lf_lock = LOCKFS_ULOCK;
lf.lf_flags = 0;
(void) qfs_fiolfs(vp, &lf, 1);
#else
/* QFS doesn't really support LOCKFS. */
#endif /* LQFS_LOCKFS */
out:
mutex_enter(&ip->mp->ms.m_waitwr_mutex);
ip->mp->mt.fi_status |= FS_LOGSTATE_KNOWN;
mutex_exit(&ip->mp->ms.m_waitwr_mutex);
return (error);
}
/*
* Set the quota file up for a particular file system.
* Called as the result of a quotaon (Q_QUOTAON) ioctl.
*/
static int
opendq(
struct ufsvfs *ufsvfsp,
struct vnode *vp, /* quota file */
struct cred *cr)
{
struct inode *qip;
struct dquot *dqp;
int error;
int quotaon = 0;
if (secpolicy_fs_quota(cr, ufsvfsp->vfs_vfs) != 0)
return (EPERM);
VN_HOLD(vp);
/*
* Check to be sure its a regular file.
*/
if (vp->v_type != VREG) {
VN_RELE(vp);
return (EACCES);
}
rw_enter(&ufsvfsp->vfs_dqrwlock, RW_WRITER);
/*
* We have vfs_dqrwlock as writer, so if quotas are disabled,
* then vfs_qinod should be NULL or we have a race somewhere.
*/
ASSERT((ufsvfsp->vfs_qflags & MQ_ENABLED) || (ufsvfsp->vfs_qinod == 0));
if ((ufsvfsp->vfs_qflags & MQ_ENABLED) != 0) {
/*
* Quotas are already enabled on this file system.
*
* If the "quotas" file was replaced (different inode)
* while quotas were enabled we don't want to re-enable
* them with a new "quotas" file. Simply print a warning
* message to the console, release the new vnode, and
* return.
* XXX - The right way to fix this is to return EBUSY
* for the ioctl() issued by 'quotaon'.
*/
if (VTOI(vp) != ufsvfsp->vfs_qinod) {
cmn_err(CE_WARN, "Previous quota file still in use."
" Disable quotas on %s before enabling.\n",
VTOI(vp)->i_fs->fs_fsmnt);
VN_RELE(vp);
rw_exit(&ufsvfsp->vfs_dqrwlock);
return (0);
}
(void) quotasync(ufsvfsp, /* do_lock */ 0);
/* remove extra hold on quota file */
VN_RELE(vp);
quotaon++;
qip = ufsvfsp->vfs_qinod;
} else {
int qlen;
ufsvfsp->vfs_qinod = VTOI(vp);
qip = ufsvfsp->vfs_qinod;
/*
* Force the file to have no partially allocated blocks
* to prevent a realloc from changing the location of
* the data. We must do this even if not logging in
* case we later remount to logging.
*/
qlen = qip->i_fs->fs_bsize * NDADDR;
/*
* Largefiles: i_size needs to be atomically accessed now.
*/
rw_enter(&qip->i_contents, RW_WRITER);
if (qip->i_size < qlen) {
if (ufs_itrunc(qip, (u_offset_t)qlen, (int)0, cr) != 0)
cmn_err(CE_WARN, "opendq failed to remove frags"
" from quota file\n");
rw_exit(&qip->i_contents);
(void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)qip->i_size,
B_INVAL, kcred, NULL);
} else {
rw_exit(&qip->i_contents);
}
TRANS_MATA_IGET(ufsvfsp, qip);
}
/*
* The file system time limits are in the dquot for uid 0.
* The time limits set the relative time the other users
* can be over quota for this file system.
* If it is zero a default is used (see quota.h).
*/
error = getdiskquota((uid_t)0, ufsvfsp, 1, &dqp);
if (error == 0) {
mutex_enter(&dqp->dq_lock);
ufsvfsp->vfs_btimelimit =
(dqp->dq_btimelimit? dqp->dq_btimelimit: DQ_BTIMELIMIT);
ufsvfsp->vfs_ftimelimit =
(dqp->dq_ftimelimit? dqp->dq_ftimelimit: DQ_FTIMELIMIT);
ufsvfsp->vfs_qflags = MQ_ENABLED; /* enable quotas */
vfs_setmntopt(ufsvfsp->vfs_vfs, MNTOPT_QUOTA, NULL, 0);
dqput(dqp);
mutex_exit(&dqp->dq_lock);
} else if (!quotaon) {
/*
* Some sort of I/O error on the quota file, and quotas were
* not already on when we got here so clean up.
*/
ufsvfsp->vfs_qflags = 0;
ufsvfsp->vfs_qinod = NULL;
VN_RELE(ITOV(qip));
}
/*
* If quotas are enabled update all valid inodes in the
* cache with quota information.
*/
if (ufsvfsp->vfs_qflags & MQ_ENABLED) {
(void) ufs_scan_inodes(0, opendq_scan_inode, ufsvfsp, ufsvfsp);
}
rw_exit(&ufsvfsp->vfs_dqrwlock);
return (error);
}
int
domount(kthread_t *td, vnode_t *vp, const char *fstype, char *fspath,
char *fspec, int fsflags)
{
struct mount *mp;
struct vfsconf *vfsp;
struct ucred *newcr, *oldcr;
int error;
/*
* Be ultra-paranoid about making sure the type and fspath
* variables will fit in our mp buffers, including the
* terminating NUL.
*/
if (strlen(fstype) >= MFSNAMELEN || strlen(fspath) >= MNAMELEN)
return (ENAMETOOLONG);
vfsp = vfs_byname_kld(fstype, td, &error);
if (vfsp == NULL)
return (ENODEV);
if (vp->v_type != VDIR)
return (ENOTDIR);
simple_lock(&vp->v_interlock);
if ((vp->v_iflag & VI_MOUNT) != 0 ||
vp->v_mountedhere != NULL) {
simple_unlock(&vp->v_interlock);
return (EBUSY);
}
vp->v_iflag |= VI_MOUNT;
simple_unlock(&vp->v_interlock);
/*
* Allocate and initialize the filesystem.
*/
vn_lock(vp, LK_SHARED | LK_RETRY);
mp = vfs_mount_alloc(vp, vfsp, fspath, td);
VOP_UNLOCK(vp);
mp->mnt_optnew = NULL;
vfs_setmntopt(mp, "from", fspec, 0);
mp->mnt_optnew = mp->mnt_opt;
mp->mnt_opt = NULL;
/*
* Set the mount level flags.
* crdup() can sleep, so do it before acquiring a mutex.
*/
newcr = crdup(kcred);
MNT_ILOCK(mp);
if (fsflags & MNT_RDONLY)
mp->mnt_flag |= MNT_RDONLY;
mp->mnt_flag &=~ MNT_UPDATEMASK;
mp->mnt_flag |= fsflags & (MNT_UPDATEMASK | MNT_FORCE | MNT_ROOTFS);
/*
* Unprivileged user can trigger mounting a snapshot, but we don't want
* him to unmount it, so we switch to privileged credentials.
*/
oldcr = mp->mnt_cred;
mp->mnt_cred = newcr;
mp->mnt_stat.f_owner = mp->mnt_cred->cr_uid;
MNT_IUNLOCK(mp);
crfree(oldcr);
/*
* Mount the filesystem.
* XXX The final recipients of VFS_MOUNT just overwrite the ndp they
* get. No freeing of cn_pnbuf.
*/
error = VFS_MOUNT(mp, td);
if (!error) {
if (mp->mnt_opt != NULL)
vfs_freeopts(mp->mnt_opt);
mp->mnt_opt = mp->mnt_optnew;
(void)VFS_STATFS(mp, &mp->mnt_stat, td);
}
/*
* Prevent external consumers of mount options from reading
* mnt_optnew.
*/
mp->mnt_optnew = NULL;
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
/*
* Put the new filesystem on the mount list after root.
*/
#ifdef FREEBSD_NAMECACHE
cache_purge(vp);
#endif
if (!error) {
vnode_t *mvp;
simple_lock(&vp->v_interlock);
vp->v_iflag &= ~VI_MOUNT;
simple_unlock(&vp->v_interlock);
vp->v_mountedhere = mp;
mountlist_append(mp);
vfs_event_signal(NULL, VQ_MOUNT, 0);
if (VFS_ROOT(mp, LK_EXCLUSIVE, &mvp, td))
panic("mount: lost mount");
mountcheckdirs(vp, mvp);
vput(mvp);
VOP_UNLOCK(vp);
if ((mp->mnt_flag & MNT_RDONLY) == 0)
vfs_syncer_add_to_worklist(mp);
vfs_unbusy(mp, td);
vfs_mountedfrom(mp, fspec);
} else {
simple_lock(&vp->v_interlock);
vp->v_iflag &= ~VI_MOUNT;
simple_unlock(&vp->v_interlock);
VOP_UNLOCK(vp);
vfs_unbusy(mp, td);
vfs_mount_destroy(mp);
}
return (error);
}
int
mount_snapshot(kthread_t *td, vnode_t **vpp, const char *fstype, char *fspath,
char *fspec, int fsflags)
{
struct vfsconf *vfsp;
struct mount *mp;
vnode_t *vp, *mvp;
struct ucred *cr;
int error;
/*
* Be ultra-paranoid about making sure the type and fspath
* variables will fit in our mp buffers, including the
* terminating NUL.
*/
if (strlen(fstype) >= MFSNAMELEN || strlen(fspath) >= MNAMELEN)
return (ENAMETOOLONG);
vfsp = vfs_byname_kld(fstype, td, &error);
if (vfsp == NULL)
return (ENODEV);
vp = *vpp;
if (vp->v_type != VDIR)
return (ENOTDIR);
/*
* We need vnode lock to protect v_mountedhere and vnode interlock
* to protect v_iflag.
*/
vn_lock(vp, LK_SHARED | LK_RETRY);
VI_LOCK(vp);
if ((vp->v_iflag & VI_MOUNT) != 0 || vp->v_mountedhere != NULL) {
VI_UNLOCK(vp);
VOP_UNLOCK(vp, 0);
return (EBUSY);
}
vp->v_iflag |= VI_MOUNT;
VI_UNLOCK(vp);
VOP_UNLOCK(vp, 0);
/*
* Allocate and initialize the filesystem.
* We don't want regular user that triggered snapshot mount to be able
* to unmount it, so pass credentials of the parent mount.
*/
mp = vfs_mount_alloc(vp, vfsp, fspath, vp->v_mount->mnt_cred);
mp->mnt_optnew = NULL;
vfs_setmntopt(mp, "from", fspec, 0);
mp->mnt_optnew = mp->mnt_opt;
mp->mnt_opt = NULL;
/*
* Set the mount level flags.
*/
mp->mnt_flag = fsflags & MNT_UPDATEMASK;
/*
* Snapshots are always read-only.
*/
mp->mnt_flag |= MNT_RDONLY;
/*
* We don't want snapshots to allow access to vulnerable setuid
* programs, so we turn off setuid when mounting snapshots.
*/
mp->mnt_flag |= MNT_NOSUID;
/*
* We don't want snapshots to be visible in regular
* mount(8) and df(1) output.
*/
mp->mnt_flag |= MNT_IGNORE;
/*
* XXX: This is evil, but we can't mount a snapshot as a regular user.
* XXX: Is is safe when snapshot is mounted from within a jail?
*/
cr = td->td_ucred;
td->td_ucred = kcred;
error = VFS_MOUNT(mp);
td->td_ucred = cr;
if (error != 0) {
VI_LOCK(vp);
vp->v_iflag &= ~VI_MOUNT;
VI_UNLOCK(vp);
vrele(vp);
vfs_unbusy(mp);
vfs_mount_destroy(mp);
*vpp = NULL;
return (error);
}
if (mp->mnt_opt != NULL)
vfs_freeopts(mp->mnt_opt);
mp->mnt_opt = mp->mnt_optnew;
(void)VFS_STATFS(mp, &mp->mnt_stat);
/*
* Prevent external consumers of mount options from reading
* mnt_optnew.
*/
mp->mnt_optnew = NULL;
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
#ifdef FREEBSD_NAMECACHE
cache_purge(vp);
#endif
VI_LOCK(vp);
vp->v_iflag &= ~VI_MOUNT;
VI_UNLOCK(vp);
vp->v_mountedhere = mp;
/* Put the new filesystem on the mount list. */
mtx_lock(&mountlist_mtx);
TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
mtx_unlock(&mountlist_mtx);
vfs_event_signal(NULL, VQ_MOUNT, 0);
if (VFS_ROOT(mp, LK_EXCLUSIVE, &mvp))
panic("mount: lost mount");
vput(vp);
vfs_unbusy(mp);
*vpp = mvp;
return (0);
}
/*
* smbfs mount vfsop
* Set up mount info record and attach it to vfs struct.
*/
static int
smbfs_mount(vfs_t *vfsp, vnode_t *mvp, struct mounta *uap, cred_t *cr)
{
char *data = uap->dataptr;
int error;
smbnode_t *rtnp = NULL; /* root of this fs */
smbmntinfo_t *smi = NULL;
dev_t smbfs_dev;
int version;
int devfd;
zone_t *zone = curproc->p_zone;
zone_t *mntzone = NULL;
smb_share_t *ssp = NULL;
smb_cred_t scred;
int flags, sec;
STRUCT_DECL(smbfs_args, args); /* smbfs mount arguments */
if ((error = secpolicy_fs_mount(cr, mvp, vfsp)) != 0)
return (error);
if (mvp->v_type != VDIR)
return (ENOTDIR);
/*
* get arguments
*
* uap->datalen might be different from sizeof (args)
* in a compatible situation.
*/
STRUCT_INIT(args, get_udatamodel());
bzero(STRUCT_BUF(args), SIZEOF_STRUCT(smbfs_args, DATAMODEL_NATIVE));
if (copyin(data, STRUCT_BUF(args), MIN(uap->datalen,
SIZEOF_STRUCT(smbfs_args, DATAMODEL_NATIVE))))
return (EFAULT);
/*
* Check mount program version
*/
version = STRUCT_FGET(args, version);
if (version != SMBFS_VERSION) {
cmn_err(CE_WARN, "mount version mismatch:"
" kernel=%d, mount=%d\n",
SMBFS_VERSION, version);
return (EINVAL);
}
/*
* Deal with re-mount requests.
*/
if (uap->flags & MS_REMOUNT) {
cmn_err(CE_WARN, "MS_REMOUNT not implemented");
return (ENOTSUP);
}
/*
* Check for busy
*/
mutex_enter(&mvp->v_lock);
if (!(uap->flags & MS_OVERLAY) &&
(mvp->v_count != 1 || (mvp->v_flag & VROOT))) {
mutex_exit(&mvp->v_lock);
return (EBUSY);
}
mutex_exit(&mvp->v_lock);
/*
* Get the "share" from the netsmb driver (ssp).
* It is returned with a "ref" (hold) for us.
* Release this hold: at errout below, or in
* smbfs_freevfs().
*/
devfd = STRUCT_FGET(args, devfd);
error = smb_dev2share(devfd, &ssp);
if (error) {
cmn_err(CE_WARN, "invalid device handle %d (%d)\n",
devfd, error);
return (error);
}
/*
* Use "goto errout" from here on.
* See: ssp, smi, rtnp, mntzone
*/
/*
* Determine the zone we're being mounted into.
*/
zone_hold(mntzone = zone); /* start with this assumption */
if (getzoneid() == GLOBAL_ZONEID) {
zone_rele(mntzone);
mntzone = zone_find_by_path(refstr_value(vfsp->vfs_mntpt));
ASSERT(mntzone != NULL);
if (mntzone != zone) {
error = EBUSY;
goto errout;
}
}
/*
* Stop the mount from going any further if the zone is going away.
*/
if (zone_status_get(mntzone) >= ZONE_IS_SHUTTING_DOWN) {
error = EBUSY;
goto errout;
}
/*
* On a Trusted Extensions client, we may have to force read-only
* for read-down mounts.
*/
if (is_system_labeled()) {
void *addr;
int ipvers = 0;
struct smb_vc *vcp;
vcp = SSTOVC(ssp);
addr = smb_vc_getipaddr(vcp, &ipvers);
error = smbfs_mount_label_policy(vfsp, addr, ipvers, cr);
if (error > 0)
goto errout;
if (error == -1) {
/* change mount to read-only to prevent write-down */
vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0);
}
}
/* Prevent unload. */
atomic_inc_32(&smbfs_mountcount);
/*
* Create a mount record and link it to the vfs struct.
* No more possiblities for errors from here on.
* Tear-down of this stuff is in smbfs_free_smi()
*
* Compare with NFS: nfsrootvp()
*/
smi = kmem_zalloc(sizeof (*smi), KM_SLEEP);
mutex_init(&smi->smi_lock, NULL, MUTEX_DEFAULT, NULL);
cv_init(&smi->smi_statvfs_cv, NULL, CV_DEFAULT, NULL);
rw_init(&smi->smi_hash_lk, NULL, RW_DEFAULT, NULL);
smbfs_init_hash_avl(&smi->smi_hash_avl);
smi->smi_share = ssp;
ssp = NULL;
/*
* Convert the anonymous zone hold acquired via zone_hold() above
* into a zone reference.
*/
zone_init_ref(&smi->smi_zone_ref);
zone_hold_ref(mntzone, &smi->smi_zone_ref, ZONE_REF_SMBFS);
zone_rele(mntzone);
mntzone = NULL;
/*
* Initialize option defaults
*/
smi->smi_flags = SMI_LLOCK;
smi->smi_acregmin = SEC2HR(SMBFS_ACREGMIN);
smi->smi_acregmax = SEC2HR(SMBFS_ACREGMAX);
smi->smi_acdirmin = SEC2HR(SMBFS_ACDIRMIN);
smi->smi_acdirmax = SEC2HR(SMBFS_ACDIRMAX);
/*
* All "generic" mount options have already been
* handled in vfs.c:domount() - see mntopts stuff.
* Query generic options using vfs_optionisset().
*/
if (vfs_optionisset(vfsp, MNTOPT_INTR, NULL))
smi->smi_flags |= SMI_INT;
if (vfs_optionisset(vfsp, MNTOPT_ACL, NULL))
smi->smi_flags |= SMI_ACL;
/*
* Get the mount options that come in as smbfs_args,
* starting with args.flags (SMBFS_MF_xxx)
*/
flags = STRUCT_FGET(args, flags);
smi->smi_uid = STRUCT_FGET(args, uid);
smi->smi_gid = STRUCT_FGET(args, gid);
smi->smi_fmode = STRUCT_FGET(args, file_mode) & 0777;
smi->smi_dmode = STRUCT_FGET(args, dir_mode) & 0777;
/*
* Hande the SMBFS_MF_xxx flags.
*/
if (flags & SMBFS_MF_NOAC)
smi->smi_flags |= SMI_NOAC;
if (flags & SMBFS_MF_ACREGMIN) {
sec = STRUCT_FGET(args, acregmin);
if (sec < 0 || sec > SMBFS_ACMINMAX)
sec = SMBFS_ACMINMAX;
smi->smi_acregmin = SEC2HR(sec);
}
if (flags & SMBFS_MF_ACREGMAX) {
sec = STRUCT_FGET(args, acregmax);
if (sec < 0 || sec > SMBFS_ACMAXMAX)
sec = SMBFS_ACMAXMAX;
smi->smi_acregmax = SEC2HR(sec);
}
if (flags & SMBFS_MF_ACDIRMIN) {
sec = STRUCT_FGET(args, acdirmin);
if (sec < 0 || sec > SMBFS_ACMINMAX)
sec = SMBFS_ACMINMAX;
smi->smi_acdirmin = SEC2HR(sec);
}
if (flags & SMBFS_MF_ACDIRMAX) {
sec = STRUCT_FGET(args, acdirmax);
if (sec < 0 || sec > SMBFS_ACMAXMAX)
sec = SMBFS_ACMAXMAX;
smi->smi_acdirmax = SEC2HR(sec);
}
/*
* Get attributes of the remote file system,
* i.e. ACL support, named streams, etc.
*/
smb_credinit(&scred, cr);
error = smbfs_smb_qfsattr(smi->smi_share, &smi->smi_fsa, &scred);
smb_credrele(&scred);
if (error) {
SMBVDEBUG("smbfs_smb_qfsattr error %d\n", error);
}
/*
* We enable XATTR by default (via smbfs_mntopts)
* but if the share does not support named streams,
* force the NOXATTR option (also clears XATTR).
* Caller will set or clear VFS_XATTR after this.
*/
if ((smi->smi_fsattr & FILE_NAMED_STREAMS) == 0)
vfs_setmntopt(vfsp, MNTOPT_NOXATTR, NULL, 0);
/*
* Ditto ACLs (disable if not supported on this share)
*/
if ((smi->smi_fsattr & FILE_PERSISTENT_ACLS) == 0) {
vfs_setmntopt(vfsp, MNTOPT_NOACL, NULL, 0);
smi->smi_flags &= ~SMI_ACL;
}
/*
* Assign a unique device id to the mount
*/
mutex_enter(&smbfs_minor_lock);
do {
smbfs_minor = (smbfs_minor + 1) & MAXMIN32;
smbfs_dev = makedevice(smbfs_major, smbfs_minor);
} while (vfs_devismounted(smbfs_dev));
mutex_exit(&smbfs_minor_lock);
vfsp->vfs_dev = smbfs_dev;
vfs_make_fsid(&vfsp->vfs_fsid, smbfs_dev, smbfsfstyp);
vfsp->vfs_data = (caddr_t)smi;
vfsp->vfs_fstype = smbfsfstyp;
vfsp->vfs_bsize = MAXBSIZE;
vfsp->vfs_bcount = 0;
smi->smi_vfsp = vfsp;
smbfs_zonelist_add(smi); /* undo in smbfs_freevfs */
/*
* Create the root vnode, which we need in unmount
* for the call to smbfs_check_table(), etc.
* Release this hold in smbfs_unmount.
*/
rtnp = smbfs_node_findcreate(smi, "\\", 1, NULL, 0, 0,
&smbfs_fattr0);
ASSERT(rtnp != NULL);
rtnp->r_vnode->v_type = VDIR;
rtnp->r_vnode->v_flag |= VROOT;
smi->smi_root = rtnp;
/*
* NFS does other stuff here too:
* async worker threads
* init kstats
*
* End of code from NFS nfsrootvp()
*/
return (0);
errout:
vfsp->vfs_data = NULL;
if (smi != NULL)
smbfs_free_smi(smi);
if (mntzone != NULL)
zone_rele(mntzone);
if (ssp != NULL)
smb_share_rele(ssp);
return (error);
}
