/*
* Public interface for creating an IP stream with shared conn_t
* Handles multiple callers in parallel by using conn_lock.
* Note that we allocate the helper stream without any locks, which means
* we might need to free it if we had two threads doing this concurrently
* for the conn_t.
*/
int
ip_create_helper_stream(conn_t *connp, ldi_ident_t li)
{
ip_helper_stream_info_t *helper;
int error;
int ret;
ASSERT(!servicing_interrupt());
if (connp->conn_helper_info != NULL) {
/* Already allocated */
return (0);
}
error = 0;
helper = kmem_alloc(sizeof (ip_helper_stream_info_t), KM_SLEEP);
/*
* open ip device via the layered interface.
* pass in kcred as some threads do not have the
* priviledge to open /dev/ip and the check in
* secpolicy_spec_open() will fail the open
*/
error = ldi_open_by_name((connp->conn_family == AF_INET6 ? DEV_IP6 :
DEV_IP), IP_HELPER_STR, kcred, &helper->iphs_handle, li);
if (error != 0) {
kmem_free(helper, sizeof (ip_helper_stream_info_t));
return (error);
}
/* Make sure we are the only one */
mutex_enter(&connp->conn_lock);
if (connp->conn_helper_info != NULL) {
/* Some other thread won - discard this stream */
mutex_exit(&connp->conn_lock);
(void) ldi_close(helper->iphs_handle, 0, kcred);
kmem_free(helper, sizeof (ip_helper_stream_info_t));
return (0);
}
connp->conn_helper_info = helper;
/*
* Share connp with the helper stream. We hold conn_lock across this
* operation.
*/
error = ldi_ioctl(helper->iphs_handle, SIOCSQPTR, (intptr_t)connp,
FKIOCTL, kcred, &ret);
if (error != 0) {
/*
* Passing in a zero flag indicates that an error
* occured and stream was not shared
*/
(void) ldi_close(helper->iphs_handle, 0, kcred);
kmem_free(helper, sizeof (ip_helper_stream_info_t));
connp->conn_helper_info = NULL;
}
mutex_exit(&connp->conn_lock);
return (error);
}
static void
vdev_disk_close(vdev_t *vd)
{
vdev_disk_t *dvd = vd->vdev_tsd;
vdev_disk_ldi_cb_t *lcb;
if (vd->vdev_reopening || dvd == NULL)
return;
if (dvd->vd_minor != NULL) {
ddi_devid_str_free(dvd->vd_minor);
dvd->vd_minor = NULL;
}
if (dvd->vd_devid != NULL) {
ddi_devid_free(dvd->vd_devid);
dvd->vd_devid = NULL;
}
if (dvd->vd_lh != NULL) {
(void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred);
dvd->vd_lh = NULL;
}
vd->vdev_delayed_close = B_FALSE;
/*
* If we closed the LDI handle due to an offline notify from LDI,
* don't free vd->vdev_tsd or unregister the callbacks here;
* the offline finalize callback or a reopen will take care of it.
*/
if (dvd->vd_ldi_offline)
return;
vdev_disk_free(vd);
}
static int
_raw_close(dev_t fd)
{
struct cred *cred;
raw_dev_t *cdi;
int rc;
int cd;
mutex_enter(&_nsc_raw_lock);
if ((cd = __raw_get_cd(fd)) == -1 || !_nsc_raw_files[cd].in_use) {
mutex_exit(&_nsc_raw_lock);
return (EIO);
}
cdi = &_nsc_raw_files[cd];
cred = ddi_get_cred();
rc = ldi_close(cdi->lh, FREAD|FWRITE, cred);
if (rc != 0) {
mutex_exit(&_nsc_raw_lock);
return (rc);
}
kmem_free(cdi->path, cdi->plen);
bzero(cdi, sizeof (*cdi));
mutex_exit(&_nsc_raw_lock);
return (0);
}
/*ARGSUSED*/
static int
lx_ptm_close(dev_t dev, int flag, int otyp, cred_t *credp)
{
ldi_handle_t lh;
major_t maj;
minor_t min, lastmin;
uint_t index;
int err;
index = DEVT_TO_INDEX(dev);
/*
* we must cleanup all the state associated with this major/minor
* terminal pair before actually closing the ptm master device.
* this is required because once the close of the ptm device is
* complete major/minor terminal pair is immediatly available for
* re-use in any zone.
*/
/* free up our saved reference for this layered handle */
lh = lx_ptm_lh_remove(index);
/* unconfigure autopush for the associated terminal slave device */
maj = lps.lps_pts_major;
min = index;
lastmin = 0;
do {
/*
* we loop here because we don't want to release this ptm
* node if autopush can't be disabled on the associated
* slave device because then bad things could happen if
* another brand were to get this terminal allocated
* to them.
*
* XXX should we ever give up?
*/
err = kstr_autopush(CLR_AUTOPUSH, &maj, &min, &lastmin,
0, NULL);
} while (err != 0);
err = ldi_close(lh, flag, credp);
/*
* note that we don't have to bother with changing the permissions
* on the associated slave device here. the reason is that no one
* can actually open the device untill it's associated master
* device is re-opened, which will result in the permissions on
* it being reset.
*/
return (err);
}
int
rds_close_transport_driver()
{
ASSERT(rds_transport_ops != NULL);
rw_enter(&rds_transport_lock, RW_WRITER);
if (rds_transport_handle != NULL) {
rds_transport_ops->rds_transport_close_ib();
(void) ldi_close(rds_transport_handle, FNDELAY, kcred);
rds_transport_handle = NULL;
}
rw_exit(&rds_transport_lock);
return (0);
}
/* Not static so zfs_osx.cpp can call it on device removal */
void
vdev_disk_close(vdev_t *vd)
{
vdev_disk_t *dvd = vd->vdev_tsd;
if (vd->vdev_reopening || dvd == NULL)
return;
#ifdef illumos
if (dvd->vd_minor != NULL) {
ddi_devid_str_free(dvd->vd_minor);
dvd->vd_minor = NULL;
}
if (dvd->vd_devid != NULL) {
ddi_devid_free(dvd->vd_devid);
dvd->vd_devid = NULL;
}
if (dvd->vd_lh != NULL) {
(void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred);
dvd->vd_lh = NULL;
}
#endif
#ifdef __APPLE__
if (dvd->vd_devvp != NULL) {
/* vnode_close() can stall during removal, so clear vd_devvp now */
struct vnode *vp = dvd->vd_devvp;
dvd->vd_devvp = NULL;
(void) thread_create(NULL, 0, vdev_disk_close_thread,
vp, 0, &p0,
TS_RUN, minclsyspri);
}
#endif
vd->vdev_delayed_close = B_FALSE;
/*
* If we closed the LDI handle due to an offline notify from LDI,
* don't free vd->vdev_tsd or unregister the callbacks here;
* the offline finalize callback or a reopen will take care of it.
*/
if (dvd->vd_offline)
return;
vdev_disk_free(vd);
}
/*
* Public interface for freeing IP helper stream
* Caller must ensure no concurrent use of the conn_t, which is normally
* done by calling this from the close routine when the conn_t is quiesced.
*/
void
ip_free_helper_stream(conn_t *connp)
{
ASSERT(!servicing_interrupt());
if (connp->conn_helper_info == NULL)
return;
ASSERT(connp->conn_helper_info->iphs_handle != NULL);
connp->conn_helper_info->iphs_rq->q_ptr =
connp->conn_helper_info->iphs_wq->q_ptr =
connp->conn_helper_info->iphs_minfo;
(void) ldi_close(connp->conn_helper_info->iphs_handle,
IP_HELPER_STR, kcred);
kmem_free(connp->conn_helper_info, sizeof (ip_helper_stream_info_t));
connp->conn_helper_info = NULL;
}
static void
vdev_disk_close(vdev_t *vd)
{
vdev_disk_t *dvd = vd->vdev_tsd;
if (vd->vdev_reopening || dvd == NULL)
return;
if (dvd->vd_minor != NULL)
ddi_devid_str_free(dvd->vd_minor);
if (dvd->vd_devid != NULL)
ddi_devid_free(dvd->vd_devid);
if (dvd->vd_lh != NULL)
(void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred);
vd->vdev_delayed_close = B_FALSE;
kmem_free(dvd, sizeof (vdev_disk_t));
vd->vdev_tsd = NULL;
}
int
rds_open_transport_driver()
{
int ret = 0;
rw_enter(&rds_transport_lock, RW_WRITER);
if (rds_transport_handle != NULL) {
/*
* Someone beat us to it.
*/
goto done;
}
if (ibt_hw_is_present() == 0) {
ret = ENODEV;
goto done;
}
if (rds_li == NULL) {
ret = EPROTONOSUPPORT;
goto done;
}
ret = ldi_open_by_name("/devices/ib/rdsib@0:rdsib",
FREAD | FWRITE, kcred, &rds_transport_handle, rds_li);
if (ret != 0) {
ret = EPROTONOSUPPORT;
rds_transport_handle = NULL;
goto done;
}
ret = rds_transport_ops->rds_transport_open_ib();
if (ret != 0) {
(void) ldi_close(rds_transport_handle, FNDELAY, kcred);
rds_transport_handle = NULL;
}
done:
rw_exit(&rds_transport_lock);
return (ret);
}
static void
vdev_disk_close_impl(vdev_t *vd, boolean_t ldi_offline)
{
vdev_disk_t *dvd;
rw_enter(&vd->vdev_tsd_lock, RW_WRITER);
dvd = vd->vdev_tsd;
if (vd->vdev_reopening || dvd == NULL)
goto out;
if (dvd->vd_minor != NULL) {
ddi_devid_str_free(dvd->vd_minor);
dvd->vd_minor = NULL;
}
if (dvd->vd_devid != NULL) {
ddi_devid_free(dvd->vd_devid);
dvd->vd_devid = NULL;
}
if (dvd->vd_lh != NULL) {
(void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred);
dvd->vd_lh = NULL;
}
vd->vdev_delayed_close = B_FALSE;
/*
* If we closed the LDI handle due to an offline notify from LDI,
* don't free vd->vdev_tsd or unregister the callbacks here;
* the offline finalize callback or a reopen will take care of it.
*/
if (!ldi_offline)
vdev_disk_free_locked(vd);
out:
rw_exit(&vd->vdev_tsd_lock);
}
/* ARGSUSED */
static int
_raw_open(char *path, int flag, blind_t *cdp, void *iodev)
{
struct cred *cred;
raw_dev_t *cdi = NULL;
char *spath;
dev_t rdev;
int rc, cd, the_cd;
int plen;
ldi_ident_t li;
if (proc_nskernd == NULL) {
cmn_err(CE_WARN, "nskern: no nskernd daemon running!");
return (ENXIO);
}
if (_nsc_raw_maxdevs == 0) {
cmn_err(CE_WARN, "nskern: _raw_open() before _nsc_init_raw()!");
return (ENXIO);
}
plen = strlen(path) + 1;
spath = kmem_alloc(plen, KM_SLEEP);
if (spath == NULL) {
cmn_err(CE_WARN,
"nskern: unable to alloc memory in _raw_open()");
return (ENOMEM);
}
(void) strcpy(spath, path);
/*
* Lookup the vnode to extract the dev_t info,
* then release the vnode.
*/
if ((rdev = ldi_get_dev_t_from_path(path)) == 0) {
kmem_free(spath, plen);
return (ENXIO);
}
/*
* See if this device is already opened
*/
the_cd = -1;
mutex_enter(&_nsc_raw_lock);
for (cd = 0, cdi = _nsc_raw_files; cd < fd_hwm; cd++, cdi++) {
if (rdev == cdi->rdev) {
the_cd = cd;
break;
} else if (the_cd == -1 && !cdi->in_use)
the_cd = cd;
}
if (the_cd == -1) {
if (fd_hwm < _nsc_raw_maxdevs)
the_cd = fd_hwm++;
else {
mutex_exit(&_nsc_raw_lock);
cmn_err(CE_WARN, "_raw_open: too many open devices");
kmem_free(spath, plen);
return (EIO);
}
}
cdi = &_nsc_raw_files[the_cd];
if (cdi->in_use) {
/* already set up - just return */
mutex_exit(&_nsc_raw_lock);
*cdp = (blind_t)cdi->rdev;
kmem_free(spath, plen);
return (0);
}
cdi->partition = -1;
cdi->size = (uint64_t)0;
cdi->rdev = rdev;
cdi->path = spath;
cdi->plen = plen;
cred = ddi_get_cred();
/*
* Layered driver
*
* We use xxx_open_by_dev() since this guarantees that a
* specfs vnode is created and used, not a standard filesystem
* vnode. This is necessary since in a cluster PXFS will block
* vnode operations during switchovers, so we have to use the
* underlying specfs vnode not the PXFS vnode.
*
*/
if ((rc = ldi_ident_from_dev(cdi->rdev, &li)) == 0) {
rc = ldi_open_by_dev(&cdi->rdev,
OTYP_BLK, FREAD|FWRITE, cred, &cdi->lh, li);
}
if (rc != 0) {
cdi->lh = NULL;
goto failed;
}
/*
* grab the major_t related information
*/
cdi->major = _raw_get_maj_info(getmajor(rdev));
if (cdi->major == NULL) {
/* Out of memory */
cmn_err(CE_WARN,
"_raw_open: cannot alloc major number structure");
rc = ENOMEM;
goto failed;
}
*cdp = (blind_t)cdi->rdev;
cdi->in_use++;
mutex_exit(&_nsc_raw_lock);
return (rc);
failed:
if (cdi->lh)
(void) ldi_close(cdi->lh, FWRITE|FREAD, cred);
bzero(cdi, sizeof (*cdi));
mutex_exit(&_nsc_raw_lock);
kmem_free(spath, plen);
return (rc);
}
static int
vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *max_psize,
uint64_t *ashift)
{
spa_t *spa = vd->vdev_spa;
vdev_disk_t *dvd = vd->vdev_tsd;
ldi_ev_cookie_t ecookie;
vdev_disk_ldi_cb_t *lcb;
union {
struct dk_minfo_ext ude;
struct dk_minfo ud;
} dks;
struct dk_minfo_ext *dkmext = &dks.ude;
struct dk_minfo *dkm = &dks.ud;
int error;
/* XXX Apple - must leave devid unchanged */
#ifdef illumos
dev_t dev;
int otyp;
boolean_t validate_devid = B_FALSE;
ddi_devid_t devid;
#endif
uint64_t capacity = 0, blksz = 0, pbsize;
#ifdef __APPLE__
int isssd;
#endif
/*
* We must have a pathname, and it must be absolute.
*/
if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
return (SET_ERROR(EINVAL));
}
/*
* Reopen the device if it's not currently open. Otherwise,
* just update the physical size of the device.
*/
if (dvd != NULL) {
if (dvd->vd_ldi_offline && dvd->vd_lh == NULL) {
/*
* If we are opening a device in its offline notify
* context, the LDI handle was just closed. Clean
* up the LDI event callbacks and free vd->vdev_tsd.
*/
vdev_disk_free(vd);
} else {
ASSERT(vd->vdev_reopening);
goto skip_open;
}
}
/*
* Create vd->vdev_tsd.
*/
vdev_disk_alloc(vd);
dvd = vd->vdev_tsd;
/*
* When opening a disk device, we want to preserve the user's original
* intent. We always want to open the device by the path the user gave
* us, even if it is one of multiple paths to the same device. But we
* also want to be able to survive disks being removed/recabled.
* Therefore the sequence of opening devices is:
*
* 1. Try opening the device by path. For legacy pools without the
* 'whole_disk' property, attempt to fix the path by appending 's0'.
*
* 2. If the devid of the device matches the stored value, return
* success.
*
* 3. Otherwise, the device may have moved. Try opening the device
* by the devid instead.
*/
/*
* XXX We must not set or modify the devid as this check would prevent
* import on Solaris/illumos.
*/
#ifdef illumos
if (vd->vdev_devid != NULL) {
if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
&dvd->vd_minor) != 0) {
vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
vdev_dbgmsg(vd, "vdev_disk_open: invalid "
"vdev_devid '%s'", vd->vdev_devid);
return (SET_ERROR(EINVAL));
}
}
#endif
error = EINVAL; /* presume failure */
if (vd->vdev_path != NULL) {
/*
* XXX This assumes that if vdev_path refers to a device path /dev/dsk/cNtNdN,
* then the whole disk can be found by slice 0 at path /dev/dsk/cNtNdNs0.
*/
#ifdef illumos
if (vd->vdev_wholedisk == -1ULL) {
size_t len = strlen(vd->vdev_path) + 3;
char *buf = kmem_alloc(len, KM_SLEEP);
(void) snprintf(buf, len, "%ss0", vd->vdev_path);
error = ldi_open_by_name(buf, spa_mode(spa), kcred,
&dvd->vd_lh, zfs_li);
if (error == 0) {
spa_strfree(vd->vdev_path);
vd->vdev_path = buf;
vd->vdev_wholedisk = 1ULL;
} else {
kmem_free(buf, len);
}
}
#endif
/*
* If we have not yet opened the device, try to open it by the
* specified path.
*/
if (error != 0) {
error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
kcred, &dvd->vd_lh, zfs_li);
}
/* XXX Apple - must leave devid unchanged */
#ifdef illumos
/*
* Compare the devid to the stored value.
*/
if (error == 0 && vd->vdev_devid != NULL &&
ldi_get_devid(dvd->vd_lh, &devid) == 0) {
if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
error = SET_ERROR(EINVAL);
(void) ldi_close(dvd->vd_lh, spa_mode(spa),
kcred);
dvd->vd_lh = NULL;
}
ddi_devid_free(devid);
}
#endif
/*
* If we succeeded in opening the device, but 'vdev_wholedisk'
* is not yet set, then this must be a slice.
*/
if (error == 0 && vd->vdev_wholedisk == -1ULL)
vd->vdev_wholedisk = 0;
}
/* XXX Apple - must leave devid unchanged */
#ifdef illumos
/*
* If we were unable to open by path, or the devid check fails, open by
* devid instead.
*/
if (error != 0 && vd->vdev_devid != NULL) {
error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
}
#endif
/*
* If all else fails, then try opening by physical path (if available)
* or the logical path (if we failed due to the devid check). While not
* as reliable as the devid, this will give us something, and the higher
* level vdev validation will prevent us from opening the wrong device.
*/
if (error) {
/* XXX Apple - must leave devid unchanged */
#ifdef illumos
if (vd->vdev_devid != NULL)
validate_devid = B_TRUE;
#endif
/* XXX Apple to do - make ddi_ interface for this, using IORegistry path */
#ifdef illumos
if (vd->vdev_physpath != NULL &&
(dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
kcred, &dvd->vd_lh, zfs_li);
#endif
/*
* Note that we don't support the legacy auto-wholedisk support
* as above. This hasn't been used in a very long time and we
* don't need to propagate its oddities to this edge condition.
*/
if (error && vd->vdev_path != NULL)
error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
kcred, &dvd->vd_lh, zfs_li);
}
if (error) {
vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
vdev_dbgmsg(vd, "vdev_disk_open: failed to open [error=%d]",
error);
return (error);
}
/*
* XXX Apple - We must not set or modify the devid. Import on Solaris/illumos
* expects a valid devid and fails if it cannot be decoded.
*/
#ifdef illumos
/*
* Now that the device has been successfully opened, update the devid
* if necessary.
*/
if (validate_devid && spa_writeable(spa) &&
ldi_get_devid(dvd->vd_lh, &devid) == 0) {
if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
char *vd_devid;
vd_devid = ddi_devid_str_encode(devid, dvd->vd_minor);
vdev_dbgmsg(vd, "vdev_disk_open: update devid from "
"'%s' to '%s'", vd->vdev_devid, vd_devid);
spa_strfree(vd->vdev_devid);
vd->vdev_devid = spa_strdup(vd_devid);
ddi_devid_str_free(vd_devid);
}
ddi_devid_free(devid);
}
#endif
/* XXX Apple to do, needs IORegistry physpath interface */
#ifdef illumos
/*
* Once a device is opened, verify that the physical device path (if
* available) is up to date.
*/
if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
char *physpath, *minorname;
physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
minorname = NULL;
if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
(vd->vdev_physpath == NULL ||
strcmp(vd->vdev_physpath, physpath) != 0)) {
if (vd->vdev_physpath)
spa_strfree(vd->vdev_physpath);
(void) strlcat(physpath, ":", MAXPATHLEN);
(void) strlcat(physpath, minorname, MAXPATHLEN);
vd->vdev_physpath = spa_strdup(physpath);
}
if (minorname)
kmem_free(minorname, strlen(minorname) + 1);
kmem_free(physpath, MAXPATHLEN);
}
#endif
/*
* Register callbacks for the LDI offline event.
*/
if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_OFFLINE, &ecookie) ==
LDI_EV_SUCCESS) {
lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
list_insert_tail(&dvd->vd_ldi_cbs, lcb);
(void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
&vdev_disk_off_callb, (void *) vd, &lcb->lcb_id);
}
/* XXX Apple to do - we could support the degrade event, or just no-op */
#ifdef illumos
/*
* Register callbacks for the LDI degrade event.
*/
if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_DEGRADE, &ecookie) ==
LDI_EV_SUCCESS) {
lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
list_insert_tail(&dvd->vd_ldi_cbs, lcb);
(void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
&vdev_disk_dgrd_callb, (void *) vd, &lcb->lcb_id);
}
#endif
#if 0
int len = MAXPATHLEN;
if (vn_getpath(devvp, dvd->vd_readlinkname, &len) == 0) {
dprintf("ZFS: '%s' resolved name is '%s'\n",
vd->vdev_path, dvd->vd_readlinkname);
} else {
dvd->vd_readlinkname[0] = 0;
}
#endif
skip_open:
/*
* Determine the actual size of the device.
*/
if (ldi_get_size(dvd->vd_lh, psize) != 0) {
vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
vdev_dbgmsg(vd, "vdev_disk_open: failed to get size");
return (SET_ERROR(EINVAL));
}
*max_psize = *psize;
/*
* Determine the device's minimum transfer size.
* If the ioctl isn't supported, assume DEV_BSIZE.
*/
if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT,
(intptr_t)dkmext, FKIOCTL, kcred, NULL)) == 0) {
capacity = dkmext->dki_capacity - 1;
blksz = dkmext->dki_lbsize;
pbsize = dkmext->dki_pbsize;
} else if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFO,
(intptr_t)dkm, FKIOCTL, kcred, NULL)) == 0) {
VDEV_DEBUG(
"vdev_disk_open(\"%s\"): fallback to DKIOCGMEDIAINFO\n",
vd->vdev_path);
capacity = dkm->dki_capacity - 1;
blksz = dkm->dki_lbsize;
pbsize = blksz;
} else {
VDEV_DEBUG("vdev_disk_open(\"%s\"): "
"both DKIOCGMEDIAINFO{,EXT} calls failed, %d\n",
vd->vdev_path, error);
pbsize = DEV_BSIZE;
}
*ashift = highbit64(MAX(pbsize, SPA_MINBLOCKSIZE)) - 1;
/* XXX Now that we opened the device, determine if it is a whole disk. */
#ifdef __APPLE__
/*
* XXX Apple to do - provide an ldi_ mechanism
* to report whether this is a whole disk or a
* partition.
* Return 0 (no), 1 (yes), or -1 (error).
*/
// vd->vdev_wholedisk = ldi_is_wholedisk(vd->vd_lh);
#endif
if (vd->vdev_wholedisk == 1) {
int wce = 1;
/* Gets information about the disk if it has GPT partitions */
#ifdef illumos
if (error == 0) {
/*
* If we have the capability to expand, we'd have
* found out via success from DKIOCGMEDIAINFO{,EXT}.
* Adjust max_psize upward accordingly since we know
* we own the whole disk now.
*/
*max_psize = capacity * blksz;
}
#endif
/*
* Since we own the whole disk, try to enable disk write
* caching. We ignore errors because it's OK if we can't do it.
*/
(void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
FKIOCTL, kcred, NULL);
}
/*
* Clear the nowritecache bit, so that on a vdev_reopen() we will
* try again.
*/
vd->vdev_nowritecache = B_FALSE;
#ifdef __APPLE__
/* Inform the ZIO pipeline that we are non-rotational */
vd->vdev_nonrot = B_FALSE;
if (ldi_ioctl(dvd->vd_lh, DKIOCISSOLIDSTATE, (intptr_t)&isssd,
FKIOCTL, kcred, NULL) == 0) {
vd->vdev_nonrot = (isssd ? B_TRUE : B_FALSE);
}
#endif //__APPLE__
return (0);
}
/*
* Given the root disk device devid or pathname, read the label from
* the device, and construct a configuration nvlist.
*/
int
vdev_disk_read_rootlabel(char *devpath, char *devid, nvlist_t **config)
{
ldi_handle_t vd_lh;
vdev_label_t *label;
uint64_t s, size;
int l;
ddi_devid_t tmpdevid;
int error = -1;
char *minor_name;
/*
* Read the device label and build the nvlist.
*/
if (devid != NULL && ddi_devid_str_decode(devid, &tmpdevid,
&minor_name) == 0) {
error = ldi_open_by_devid(tmpdevid, minor_name,
FREAD, kcred, &vd_lh, zfs_li);
ddi_devid_free(tmpdevid);
ddi_devid_str_free(minor_name);
}
if (error && (error = ldi_open_by_name(devpath, FREAD, kcred, &vd_lh,
zfs_li)))
return (error);
if (ldi_get_size(vd_lh, &s)) {
(void) ldi_close(vd_lh, FREAD, kcred);
return (SET_ERROR(EIO));
}
size = P2ALIGN_TYPED(s, sizeof (vdev_label_t), uint64_t);
label = kmem_alloc(sizeof (vdev_label_t), KM_SLEEP);
*config = NULL;
for (l = 0; l < VDEV_LABELS; l++) {
uint64_t offset, state, txg = 0;
/* read vdev label */
offset = vdev_label_offset(size, l, 0);
if (vdev_disk_ldi_physio(vd_lh, (caddr_t)label,
VDEV_SKIP_SIZE + VDEV_PHYS_SIZE, offset, B_READ) != 0)
continue;
if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist,
sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) {
*config = NULL;
continue;
}
if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE,
&state) != 0 || state >= POOL_STATE_DESTROYED) {
nvlist_free(*config);
*config = NULL;
continue;
}
if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG,
&txg) != 0 || txg == 0) {
nvlist_free(*config);
*config = NULL;
continue;
}
break;
}
kmem_free(label, sizeof (vdev_label_t));
(void) ldi_close(vd_lh, FREAD, kcred);
if (*config == NULL)
error = SET_ERROR(EIDRM);
return (error);
}
static int
vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *max_psize,
uint64_t *ashift)
{
spa_t *spa = vd->vdev_spa;
vdev_disk_t *dvd;
ldi_ev_cookie_t ecookie;
vdev_disk_ldi_cb_t *lcb;
union {
struct dk_minfo_ext ude;
struct dk_minfo ud;
} dks;
struct dk_minfo_ext *dkmext = &dks.ude;
struct dk_minfo *dkm = &dks.ud;
int error;
dev_t dev;
int otyp;
boolean_t validate_devid = B_FALSE;
ddi_devid_t devid;
uint64_t capacity = 0, blksz = 0, pbsize;
/*
* We must have a pathname, and it must be absolute.
*/
if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
return (SET_ERROR(EINVAL));
}
rw_enter(&vd->vdev_tsd_lock, RW_WRITER);
dvd = vd->vdev_tsd;
/*
* Reopen the device if it's not currently open. Otherwise,
* just update the physical size of the device.
*/
if (dvd != NULL) {
ASSERT(vd->vdev_reopening);
/*
* Here vd_lh is protected by vdev_tsd_lock
*/
ASSERT(dvd->vd_lh != NULL);
/* This should not happen, but let's be safe */
if (dvd->vd_lh == NULL) {
/* What are we going to do here??? */
rw_exit(&vd->vdev_tsd_lock);
return (SET_ERROR(ENXIO));
}
goto skip_open;
}
/*
* Create dvd to be used as vd->vdev_tsd.
*/
vd->vdev_tsd = dvd = vdev_disk_alloc();
/*
* When opening a disk device, we want to preserve the user's original
* intent. We always want to open the device by the path the user gave
* us, even if it is one of multiple paths to the same device. But we
* also want to be able to survive disks being removed/recabled.
* Therefore the sequence of opening devices is:
*
* 1. Try opening the device by path. For legacy pools without the
* 'whole_disk' property, attempt to fix the path by appending 's0'.
*
* 2. If the devid of the device matches the stored value, return
* success.
*
* 3. Otherwise, the device may have moved. Try opening the device
* by the devid instead.
*/
if (vd->vdev_devid != NULL) {
if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
&dvd->vd_minor) != 0) {
vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
vdev_disk_free_locked(vd);
rw_exit(&vd->vdev_tsd_lock);
return (SET_ERROR(EINVAL));
}
}
error = EINVAL; /* presume failure */
if (vd->vdev_path != NULL) {
if (vd->vdev_wholedisk == -1ULL) {
size_t len = strlen(vd->vdev_path) + 3;
char *buf = kmem_alloc(len, KM_SLEEP);
(void) snprintf(buf, len, "%ss0", vd->vdev_path);
error = ldi_open_by_name(buf, spa_mode(spa), kcred,
&dvd->vd_lh, zfs_li);
if (error == 0) {
spa_strfree(vd->vdev_path);
vd->vdev_path = buf;
vd->vdev_wholedisk = 1ULL;
} else {
kmem_free(buf, len);
}
}
/*
* If we have not yet opened the device, try to open it by the
* specified path.
*/
if (error != 0) {
error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
kcred, &dvd->vd_lh, zfs_li);
}
/*
* Compare the devid to the stored value.
*/
if (error == 0 && vd->vdev_devid != NULL &&
ldi_get_devid(dvd->vd_lh, &devid) == 0) {
if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
error = SET_ERROR(EINVAL);
(void) ldi_close(dvd->vd_lh, spa_mode(spa),
kcred);
dvd->vd_lh = NULL;
}
ddi_devid_free(devid);
}
/*
* If we succeeded in opening the device, but 'vdev_wholedisk'
* is not yet set, then this must be a slice.
*/
if (error == 0 && vd->vdev_wholedisk == -1ULL)
vd->vdev_wholedisk = 0;
}
/*
* If we were unable to open by path, or the devid check fails, open by
* devid instead.
*/
if (error != 0 && vd->vdev_devid != NULL) {
error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
}
/*
* If all else fails, then try opening by physical path (if available)
* or the logical path (if we failed due to the devid check). While not
* as reliable as the devid, this will give us something, and the higher
* level vdev validation will prevent us from opening the wrong device.
*/
if (error) {
if (vd->vdev_devid != NULL)
validate_devid = B_TRUE;
if (vd->vdev_physpath != NULL &&
(dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
kcred, &dvd->vd_lh, zfs_li);
/*
* Note that we don't support the legacy auto-wholedisk support
* as above. This hasn't been used in a very long time and we
* don't need to propagate its oddities to this edge condition.
*/
if (error && vd->vdev_path != NULL)
error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
kcred, &dvd->vd_lh, zfs_li);
}
if (error) {
vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
vdev_disk_free_locked(vd);
rw_exit(&vd->vdev_tsd_lock);
return (error);
}
/*
* Now that the device has been successfully opened, update the devid
* if necessary.
*/
if (validate_devid && spa_writeable(spa) &&
ldi_get_devid(dvd->vd_lh, &devid) == 0) {
if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
char *vd_devid;
vd_devid = ddi_devid_str_encode(devid, dvd->vd_minor);
zfs_dbgmsg("vdev %s: update devid from %s, "
"to %s", vd->vdev_path, vd->vdev_devid, vd_devid);
spa_strfree(vd->vdev_devid);
vd->vdev_devid = spa_strdup(vd_devid);
ddi_devid_str_free(vd_devid);
}
ddi_devid_free(devid);
}
/*
* Once a device is opened, verify that the physical device path (if
* available) is up to date.
*/
if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
char *physpath, *minorname;
physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
minorname = NULL;
if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
(vd->vdev_physpath == NULL ||
strcmp(vd->vdev_physpath, physpath) != 0)) {
if (vd->vdev_physpath)
spa_strfree(vd->vdev_physpath);
(void) strlcat(physpath, ":", MAXPATHLEN);
(void) strlcat(physpath, minorname, MAXPATHLEN);
vd->vdev_physpath = spa_strdup(physpath);
}
if (minorname)
kmem_free(minorname, strlen(minorname) + 1);
kmem_free(physpath, MAXPATHLEN);
}
/*
* Register callbacks for the LDI offline event.
*/
if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_OFFLINE, &ecookie) ==
LDI_EV_SUCCESS) {
lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
list_insert_tail(&dvd->vd_ldi_cbs, lcb);
(void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
&vdev_disk_off_callb, (void *) vd, &lcb->lcb_id);
}
/*
* Register callbacks for the LDI degrade event.
*/
if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_DEGRADE, &ecookie) ==
LDI_EV_SUCCESS) {
lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
list_insert_tail(&dvd->vd_ldi_cbs, lcb);
(void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
&vdev_disk_dgrd_callb, (void *) vd, &lcb->lcb_id);
}
/* Reset TRIM flag, as underlying device support may have changed */
vd->vdev_notrim = B_FALSE;
skip_open:
ASSERT(dvd != NULL);
/*
* Determine the actual size of the device.
*/
if (ldi_get_size(dvd->vd_lh, psize) != 0) {
vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
vdev_disk_free_locked(vd);
rw_exit(&vd->vdev_tsd_lock);
return (SET_ERROR(EINVAL));
}
*max_psize = *psize;
/*
* Determine the device's minimum transfer size.
* If the ioctl isn't supported, assume DEV_BSIZE.
*/
if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT,
(intptr_t)dkmext, FKIOCTL, kcred, NULL)) == 0) {
capacity = dkmext->dki_capacity - 1;
blksz = dkmext->dki_lbsize;
pbsize = dkmext->dki_pbsize;
} else if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFO,
(intptr_t)dkm, FKIOCTL, kcred, NULL)) == 0) {
VDEV_DEBUG(
"vdev_disk_open(\"%s\"): fallback to DKIOCGMEDIAINFO\n",
vd->vdev_path);
capacity = dkm->dki_capacity - 1;
blksz = dkm->dki_lbsize;
pbsize = blksz;
} else {
VDEV_DEBUG("vdev_disk_open(\"%s\"): "
"both DKIOCGMEDIAINFO{,EXT} calls failed, %d\n",
vd->vdev_path, error);
pbsize = DEV_BSIZE;
}
*ashift = highbit64(MAX(pbsize, SPA_MINBLOCKSIZE)) - 1;
if (vd->vdev_wholedisk == 1) {
int wce = 1;
if (error == 0) {
/*
* If we have the capability to expand, we'd have
* found out via success from DKIOCGMEDIAINFO{,EXT}.
* Adjust max_psize upward accordingly since we know
* we own the whole disk now.
*/
*max_psize += vdev_disk_get_space(vd, capacity, blksz);
zfs_dbgmsg("capacity change: vdev %s, psize %llu, "
"max_psize %llu", vd->vdev_path, *psize,
*max_psize);
}
/*
* Since we own the whole disk, try to enable disk write
* caching. We ignore errors because it's OK if we can't do it.
*/
(void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
FKIOCTL, kcred, NULL);
}
/*
* We are done with vd_lh and vdev_tsd, release the vdev_tsd_lock
*/
rw_exit(&vd->vdev_tsd_lock);
/*
* Clear the nowritecache bit, so that on a vdev_reopen() we will
* try again.
*/
vd->vdev_nowritecache = B_FALSE;
return (0);
}
/*ARGSUSED*/
static int
lx_ptm_open(dev_t *devp, int flag, int otyp, cred_t *credp)
{
struct strioctl iocb;
ptmptsopencb_t ppocb = { NULL, NULL };
ldi_handle_t lh;
major_t maj, our_major = getmajor(*devp);
minor_t min, lastmin;
uint_t index, anchor = 1;
dev_t ptm_dev;
int err, rval = 0;
/*
* Don't support the FNDELAY flag and FNONBLOCK until we either
* find a Linux app that opens /dev/ptmx with the O_NDELAY
* or O_NONBLOCK flags explicitly, or until we create test cases
* to determine how reads of master terminal devices opened with
* these flags behave in different situations on Linux. Supporting
* these flags will involve enhancing our read implementation
* and changing the way it deals with EOF notifications.
*/
if (flag & (FNDELAY | FNONBLOCK))
return (ENOTSUP);
/*
* we're layered on top of the ptm driver so open that driver
* first. (note that we're opening /dev/ptmx in the global
* zone, not ourselves in the Linux zone.)
*/
err = ldi_open_by_name(LP_PTM_PATH, flag, credp, &lh, lps.lps_li);
if (err != 0)
return (err);
/* get the devt returned by the ptmx open */
err = ldi_get_dev(lh, &ptm_dev);
if (err != 0) {
(void) ldi_close(lh, flag, credp);
return (err);
}
/*
* we're a cloning driver so here's well change the devt that we
* return. the ptmx is also a cloning driver so we'll just use
* it's minor number as our minor number (it already manages it's
* minor name space so no reason to duplicate the effort.)
*/
index = getminor(ptm_dev);
*devp = makedevice(our_major, INDEX_TO_MINOR(index));
/* Get a callback function to query if the pts device is open. */
iocb.ic_cmd = PTMPTSOPENCB;
iocb.ic_timout = 0;
iocb.ic_len = sizeof (ppocb);
iocb.ic_dp = (char *)&ppocb;
err = ldi_ioctl(lh, I_STR, (intptr_t)&iocb, FKIOCTL, kcred, &rval);
if ((err != 0) || (rval != 0)) {
(void) ldi_close(lh, flag, credp);
return (EIO); /* XXX return something else here? */
}
ASSERT(ppocb.ppocb_func != NULL);
/*
* now setup autopush for the terminal slave device. this is
* necessary so that when a Linux program opens the device we
* can push required strmod modules onto the stream. in Solaris
* this is normally done by the application that actually
* allocates the terminal.
*/
maj = lps.lps_pts_major;
min = index;
lastmin = 0;
err = kstr_autopush(SET_AUTOPUSH, &maj, &min, &lastmin,
&anchor, lx_pts_mods);
if (err != 0) {
(void) ldi_close(lh, flag, credp);
return (EIO); /* XXX return something else here? */
}
/* save off this layered handle for future accesses */
lx_ptm_lh_insert(index, lh);
lx_ptm_lh_set_ppocb(index, &ppocb);
return (0);
}
static int
vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
{
spa_t *spa = vd->vdev_spa;
vdev_disk_t *dvd;
struct dk_minfo_ext dkmext;
int error;
dev_t dev;
int otyp;
/*
* We must have a pathname, and it must be absolute.
*/
if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
return (EINVAL);
}
/*
* Reopen the device if it's not currently open. Otherwise,
* just update the physical size of the device.
*/
if (vd->vdev_tsd != NULL) {
ASSERT(vd->vdev_reopening);
dvd = vd->vdev_tsd;
goto skip_open;
}
dvd = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_disk_t), KM_SLEEP);
/*
* When opening a disk device, we want to preserve the user's original
* intent. We always want to open the device by the path the user gave
* us, even if it is one of multiple paths to the save device. But we
* also want to be able to survive disks being removed/recabled.
* Therefore the sequence of opening devices is:
*
* 1. Try opening the device by path. For legacy pools without the
* 'whole_disk' property, attempt to fix the path by appending 's0'.
*
* 2. If the devid of the device matches the stored value, return
* success.
*
* 3. Otherwise, the device may have moved. Try opening the device
* by the devid instead.
*/
if (vd->vdev_devid != NULL) {
if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
&dvd->vd_minor) != 0) {
vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
return (EINVAL);
}
}
error = EINVAL; /* presume failure */
if (vd->vdev_path != NULL) {
ddi_devid_t devid;
if (vd->vdev_wholedisk == -1ULL) {
size_t len = strlen(vd->vdev_path) + 3;
char *buf = kmem_alloc(len, KM_SLEEP);
ldi_handle_t lh;
(void) snprintf(buf, len, "%ss0", vd->vdev_path);
if (ldi_open_by_name(buf, spa_mode(spa), kcred,
&lh, zfs_li) == 0) {
spa_strfree(vd->vdev_path);
vd->vdev_path = buf;
vd->vdev_wholedisk = 1ULL;
(void) ldi_close(lh, spa_mode(spa), kcred);
} else {
kmem_free(buf, len);
}
}
error = ldi_open_by_name(vd->vdev_path, spa_mode(spa), kcred,
&dvd->vd_lh, zfs_li);
/*
* Compare the devid to the stored value.
*/
if (error == 0 && vd->vdev_devid != NULL &&
ldi_get_devid(dvd->vd_lh, &devid) == 0) {
if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
error = EINVAL;
(void) ldi_close(dvd->vd_lh, spa_mode(spa),
kcred);
dvd->vd_lh = NULL;
}
ddi_devid_free(devid);
}
/*
* If we succeeded in opening the device, but 'vdev_wholedisk'
* is not yet set, then this must be a slice.
*/
if (error == 0 && vd->vdev_wholedisk == -1ULL)
vd->vdev_wholedisk = 0;
}
/*
* If we were unable to open by path, or the devid check fails, open by
* devid instead.
*/
if (error != 0 && vd->vdev_devid != NULL)
error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
/*
* If all else fails, then try opening by physical path (if available)
* or the logical path (if we failed due to the devid check). While not
* as reliable as the devid, this will give us something, and the higher
* level vdev validation will prevent us from opening the wrong device.
*/
if (error) {
if (vd->vdev_physpath != NULL &&
(dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
kcred, &dvd->vd_lh, zfs_li);
/*
* Note that we don't support the legacy auto-wholedisk support
* as above. This hasn't been used in a very long time and we
* don't need to propagate its oddities to this edge condition.
*/
if (error && vd->vdev_path != NULL)
error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
kcred, &dvd->vd_lh, zfs_li);
}
if (error) {
vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
return (error);
}
/*
* Once a device is opened, verify that the physical device path (if
* available) is up to date.
*/
if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
char *physpath, *minorname;
physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
minorname = NULL;
if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
(vd->vdev_physpath == NULL ||
strcmp(vd->vdev_physpath, physpath) != 0)) {
if (vd->vdev_physpath)
spa_strfree(vd->vdev_physpath);
(void) strlcat(physpath, ":", MAXPATHLEN);
(void) strlcat(physpath, minorname, MAXPATHLEN);
vd->vdev_physpath = spa_strdup(physpath);
}
if (minorname)
kmem_free(minorname, strlen(minorname) + 1);
kmem_free(physpath, MAXPATHLEN);
}
skip_open:
/*
* Determine the actual size of the device.
*/
if (ldi_get_size(dvd->vd_lh, psize) != 0) {
vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
return (EINVAL);
}
/*
* If we own the whole disk, try to enable disk write caching.
* We ignore errors because it's OK if we can't do it.
*/
if (vd->vdev_wholedisk == 1) {
int wce = 1;
(void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
FKIOCTL, kcred, NULL);
}
/*
* Determine the device's minimum transfer size.
* If the ioctl isn't supported, assume DEV_BSIZE.
*/
if (ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT, (intptr_t)&dkmext,
FKIOCTL, kcred, NULL) != 0)
dkmext.dki_pbsize = DEV_BSIZE;
*ashift = highbit(MAX(dkmext.dki_pbsize, SPA_MINBLOCKSIZE)) - 1;
/*
* Clear the nowritecache bit, so that on a vdev_reopen() we will
* try again.
*/
vd->vdev_nowritecache = B_FALSE;
return (0);
}
static void
sdp_gen_ioctl(queue_t *q, mblk_t *mp)
{
struct iocblk *iocp;
int32_t enable = 0;
int ret;
boolean_t priv = B_TRUE;
/* LINTED */
iocp = (struct iocblk *)mp->b_rptr;
switch (iocp->ioc_cmd) {
int32_t send_enable;
case SIOCSENABLESDP:
bcopy(mp->b_cont->b_rptr, &enable, sizeof (int));
send_enable = enable;
/*
* Check for root privs.
* if not net config privs - return state of system SDP
*/
if (secpolicy_net_config(CRED(), B_FALSE) != 0) {
priv = B_FALSE;
}
/*
* The sdpib driver is loaded if root enables sdp the
* first time (sdp_transport_handle is NULL). It is
* unloaded during the following first disable. At all
* other times for root as well as non-root users, the
* action of enabling/disabling sdp is simply acked.
*/
rw_enter(&sdp_transport_lock, RW_READER);
if ((send_enable == 1) &&
(sdp_transport_handle == NULL) &&
(priv == B_TRUE)) {
/* Initialize sdpib transport driver */
rw_exit(&sdp_transport_lock);
ret = sdp_open_sdpib_driver();
rw_enter(&sdp_transport_lock,
RW_READER);
if (ret != 0) {
/* Transport failed to load */
rw_exit(&sdp_transport_lock);
enable = 0;
goto done;
}
(void) ldi_ioctl(sdp_transport_handle,
iocp->ioc_cmd, (intptr_t)&send_enable,
FKIOCTL, CRED(), (int *)&enable);
} else if (sdp_transport_handle != NULL) {
(void) ldi_ioctl(sdp_transport_handle,
iocp->ioc_cmd, (intptr_t)&send_enable,
FKIOCTL, CRED(), (int *)&enable);
if (send_enable == 0 && priv == B_TRUE) {
(void) ldi_close(sdp_transport_handle,
FNDELAY, kcred);
sdp_transport_handle = NULL;
}
} else {
enable = 0;
}
rw_exit(&sdp_transport_lock);
done:
bcopy(&enable, mp->b_cont->b_rptr, sizeof (int));
/* ACK the ioctl */
mp->b_datap->db_type = M_IOCACK;
iocp->ioc_count = sizeof (int);
qreply(q, mp);
break;
default:
miocnak(q, mp, 0, ENOTSUP);
}
}