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vdev_disk.c
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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2018 by Delphix. All rights reserved.
* Copyright 2016 Nexenta Systems, Inc. All rights reserved.
* Copyright 2020 Joyent, Inc.
* Copyright 2020 Joshua M. Clulow <[email protected]>
* Copyright 2022 Tintri by DDN, Inc. All rights reserved.
*/
#include <sys/zfs_context.h>
#include <sys/spa_impl.h>
#include <sys/refcount.h>
#include <sys/vdev_impl.h>
#include <sys/vdev_trim.h>
#include <sys/abd.h>
#include <sys/fs/zfs.h>
#include <sys/zio.h>
#include <sys/sunldi.h>
#include <sys/efi_partition.h>
#include <sys/fm/fs/zfs.h>
#include <sys/ddi.h>
/*
* Tunable to disable TRIM in case we're using a problematic SSD.
*/
uint_t zfs_no_trim = 0;
/*
* Tunable parameter for debugging or performance analysis. Setting this
* will cause pool corruption on power loss if a volatile out-of-order
* write cache is enabled.
*/
boolean_t zfs_nocacheflush = B_FALSE;
/*
* Virtual device vector for disks.
*/
extern ldi_ident_t zfs_li;
static void vdev_disk_close(vdev_t *);
typedef struct vdev_disk {
ddi_devid_t vd_devid;
char *vd_minor;
ldi_handle_t vd_lh;
list_t vd_ldi_cbs;
boolean_t vd_ldi_offline;
} vdev_disk_t;
typedef struct vdev_disk_buf {
buf_t vdb_buf;
zio_t *vdb_io;
} vdev_disk_buf_t;
typedef struct vdev_disk_ldi_cb {
list_node_t lcb_next;
ldi_callback_id_t lcb_id;
} vdev_disk_ldi_cb_t;
/*
* Bypass the devid when opening a disk vdev.
* There have been issues where the devids of several devices were shuffled,
* causing pool open failures. Note, that this flag is intended to be used
* for pool recovery only.
*
* Note that if a pool is imported with the devids bypassed, all its vdevs will
* cease storing devid information permanently. In practice, the devid is rarely
* useful as vdev paths do not tend to change unless the hardware is
* reconfigured. That said, if the paths do change and a pool fails to open
* automatically at boot, a simple zpool import should re-scan the paths and fix
* the issue.
*/
boolean_t vdev_disk_bypass_devid = B_FALSE;
static void
vdev_disk_alloc(vdev_t *vd)
{
vdev_disk_t *dvd;
dvd = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_disk_t), KM_SLEEP);
/*
* Create the LDI event callback list.
*/
list_create(&dvd->vd_ldi_cbs, sizeof (vdev_disk_ldi_cb_t),
offsetof(vdev_disk_ldi_cb_t, lcb_next));
}
static void
vdev_disk_free(vdev_t *vd)
{
vdev_disk_t *dvd = vd->vdev_tsd;
vdev_disk_ldi_cb_t *lcb;
if (dvd == NULL)
return;
/*
* We have already closed the LDI handle. Clean up the LDI event
* callbacks and free vd->vdev_tsd.
*/
while ((lcb = list_head(&dvd->vd_ldi_cbs)) != NULL) {
list_remove(&dvd->vd_ldi_cbs, lcb);
(void) ldi_ev_remove_callbacks(lcb->lcb_id);
kmem_free(lcb, sizeof (vdev_disk_ldi_cb_t));
}
list_destroy(&dvd->vd_ldi_cbs);
kmem_free(dvd, sizeof (vdev_disk_t));
vd->vdev_tsd = NULL;
}
static int
vdev_disk_off_notify(ldi_handle_t lh __unused, ldi_ev_cookie_t ecookie,
void *arg, void *ev_data __unused)
{
vdev_t *vd = (vdev_t *)arg;
vdev_disk_t *dvd = vd->vdev_tsd;
/*
* Ignore events other than offline.
*/
if (strcmp(ldi_ev_get_type(ecookie), LDI_EV_OFFLINE) != 0)
return (LDI_EV_SUCCESS);
/*
* Tell any new threads that stumble upon this vdev that they should not
* try to do I/O.
*/
dvd->vd_ldi_offline = B_TRUE;
/*
* Request that the spa_async_thread mark the device as REMOVED and
* notify FMA of the removal. This should also trigger a vdev_close()
* in the async thread.
*/
zfs_post_remove(vd->vdev_spa, vd);
vd->vdev_remove_wanted = B_TRUE;
spa_async_request(vd->vdev_spa, SPA_ASYNC_REMOVE);
return (LDI_EV_SUCCESS);
}
static void
vdev_disk_off_finalize(ldi_handle_t lh __unused, ldi_ev_cookie_t ecookie,
int ldi_result, void *arg, void *ev_data __unused)
{
vdev_t *vd = (vdev_t *)arg;
/*
* Ignore events other than offline.
*/
if (strcmp(ldi_ev_get_type(ecookie), LDI_EV_OFFLINE) != 0)
return;
/*
* Request that the vdev be reopened if the offline state change was
* unsuccessful.
*/
if (ldi_result != LDI_EV_SUCCESS) {
vd->vdev_probe_wanted = B_TRUE;
spa_async_request(vd->vdev_spa, SPA_ASYNC_PROBE);
}
}
static ldi_ev_callback_t vdev_disk_off_callb = {
.cb_vers = LDI_EV_CB_VERS,
.cb_notify = vdev_disk_off_notify,
.cb_finalize = vdev_disk_off_finalize
};
static void
vdev_disk_dgrd_finalize(ldi_handle_t lh __unused, ldi_ev_cookie_t ecookie,
int ldi_result, void *arg, void *ev_data __unused)
{
vdev_t *vd = (vdev_t *)arg;
/*
* Ignore events other than degrade.
*/
if (strcmp(ldi_ev_get_type(ecookie), LDI_EV_DEGRADE) != 0)
return;
/*
* Degrade events always succeed. Mark the vdev as degraded.
* This status is purely informative for the user.
*/
(void) vdev_degrade(vd->vdev_spa, vd->vdev_guid, 0);
}
static ldi_ev_callback_t vdev_disk_dgrd_callb = {
.cb_vers = LDI_EV_CB_VERS,
.cb_notify = NULL,
.cb_finalize = vdev_disk_dgrd_finalize
};
static void
vdev_disk_hold(vdev_t *vd)
{
ddi_devid_t devid;
char *minor;
ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
/*
* We must have a pathname, and it must be absolute.
*/
if (vd->vdev_path == NULL || vd->vdev_path[0] != '/')
return;
/*
* Only prefetch path and devid info if the device has
* never been opened.
*/
if (vd->vdev_tsd != NULL)
return;
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);
(void) ldi_vp_from_name(buf, &vd->vdev_name_vp);
kmem_free(buf, len);
}
if (vd->vdev_name_vp == NULL)
(void) ldi_vp_from_name(vd->vdev_path, &vd->vdev_name_vp);
if (vd->vdev_devid != NULL &&
ddi_devid_str_decode(vd->vdev_devid, &devid, &minor) == 0) {
(void) ldi_vp_from_devid(devid, minor, &vd->vdev_devid_vp);
ddi_devid_str_free(minor);
ddi_devid_free(devid);
}
}
static void
vdev_disk_rele(vdev_t *vd)
{
ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
if (vd->vdev_name_vp) {
VN_RELE_ASYNC(vd->vdev_name_vp,
dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
vd->vdev_name_vp = NULL;
}
if (vd->vdev_devid_vp) {
VN_RELE_ASYNC(vd->vdev_devid_vp,
dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
vd->vdev_devid_vp = NULL;
}
}
/*
* We want to be loud in DEBUG kernels when DKIOCGMEDIAINFOEXT fails, or when
* even a fallback to DKIOCGMEDIAINFO fails.
*/
#ifdef DEBUG
#define VDEV_DEBUG(...) cmn_err(CE_NOTE, __VA_ARGS__)
#else
#define VDEV_DEBUG(...) /* Nothing... */
#endif
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, can_free;
dev_t dev;
int otyp;
boolean_t validate_devid = B_FALSE;
uint64_t capacity = 0, blksz = 0, pbsize;
const char *rdpath = vdev_disk_preroot_force_path();
/*
* 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) {
ASSERT(vd->vdev_reopening);
goto skip_open;
}
/*
* Create vd->vdev_tsd.
*/
vdev_disk_alloc(vd);
dvd = vd->vdev_tsd;
/*
* Allow bypassing the devid.
*/
if (vd->vdev_devid != NULL &&
(vdev_disk_bypass_devid || rdpath != NULL)) {
vdev_dbgmsg(vd, "vdev_disk_open, devid %s bypassed",
vd->vdev_devid);
spa_strfree(vd->vdev_devid);
vd->vdev_devid = NULL;
}
/*
* 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) {
vdev_dbgmsg(vd,
"vdev_disk_open, invalid devid %s bypassed",
vd->vdev_devid);
spa_strfree(vd->vdev_devid);
vd->vdev_devid = NULL;
}
}
error = EINVAL; /* presume failure */
if (rdpath != NULL) {
/*
* We have been asked to open only a specific root device, and
* to fail otherwise.
*/
error = ldi_open_by_name((char *)rdpath, spa_mode(spa), kcred,
&dvd->vd_lh, zfs_li);
validate_devid = B_TRUE;
goto rootdisk_only;
}
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) {
ddi_devid_t devid = NULL;
if (ldi_get_devid(dvd->vd_lh, &devid) != 0) {
/*
* We expected a devid on this device but it no
* longer appears to have one. The validation
* step may need to remove it from the
* configuration.
*/
validate_devid = B_TRUE;
} else if (ddi_devid_compare(devid, dvd->vd_devid) !=
0) {
/*
* A mismatch here is unexpected, log it.
*/
char *devid_str = ddi_devid_str_encode(devid,
dvd->vd_minor);
vdev_dbgmsg(vd, "vdev_disk_open: devid "
"mismatch: %s != %s", vd->vdev_devid,
devid_str);
cmn_err(CE_NOTE, "vdev_disk_open %s: devid "
"mismatch: %s != %s", vd->vdev_path,
vd->vdev_devid, devid_str);
ddi_devid_str_free(devid_str);
error = SET_ERROR(EINVAL);
(void) ldi_close(dvd->vd_lh, spa_mode(spa),
kcred);
dvd->vd_lh = NULL;
}
if (devid != 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 (error != 0) {
vdev_dbgmsg(vd, "Failed to open by devid (%s)",
vd->vdev_devid);
}
}
/*
* 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 != 0) {
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 != 0 && vd->vdev_path != NULL) {
error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
kcred, &dvd->vd_lh, zfs_li);
}
}
/*
* If this is early in boot, a sweep of available block devices may
* locate an alternative path that we can try.
*/
if (error != 0) {
const char *altdevpath = vdev_disk_preroot_lookup(
spa_guid(spa), vd->vdev_guid);
if (altdevpath != NULL) {
vdev_dbgmsg(vd, "Trying alternate preroot path (%s)",
altdevpath);
validate_devid = B_TRUE;
if ((error = ldi_open_by_name((char *)altdevpath,
spa_mode(spa), kcred, &dvd->vd_lh, zfs_li)) != 0) {
vdev_dbgmsg(vd, "Failed to open by preroot "
"path (%s)", altdevpath);
}
}
}
rootdisk_only:
if (error != 0) {
vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
vdev_dbgmsg(vd, "vdev_disk_open: failed to open [error=%d]",
error);
return (error);
}
/*
* Now that the device has been successfully opened, update the devid
* if necessary.
*/
if (validate_devid) {
ddi_devid_t devid = NULL;
char *minorname = NULL;
char *vd_devid = NULL;
boolean_t remove = B_FALSE, update = B_FALSE;
/*
* Get the current devid and minor name for the device we
* opened.
*/
if (ldi_get_devid(dvd->vd_lh, &devid) != 0 ||
ldi_get_minor_name(dvd->vd_lh, &minorname) != 0) {
/*
* If we are unable to get the devid or the minor name
* for the device, we need to remove them from the
* configuration to prevent potential inconsistencies.
*/
if (dvd->vd_minor != NULL || dvd->vd_devid != NULL ||
vd->vdev_devid != NULL) {
/*
* We only need to remove the devid if one
* exists.
*/
remove = B_TRUE;
}
} else if (dvd->vd_devid == NULL || dvd->vd_minor == NULL) {
/*
* There was previously no devid at all so we need to
* add one.
*/
update = B_TRUE;
} else if (ddi_devid_compare(devid, dvd->vd_devid) != 0 ||
strcmp(minorname, dvd->vd_minor) != 0) {
/*
* The devid or minor name on file does not match the
* one from the opened device.
*/
update = B_TRUE;
}
if (update) {
/*
* Render the new devid and minor name as a string for
* logging and to store in the vdev configuration.
*/
vd_devid = ddi_devid_str_encode(devid, minorname);
}
if (update || remove) {
vdev_dbgmsg(vd, "vdev_disk_open: update devid from "
"'%s' to '%s'",
vd->vdev_devid != NULL ? vd->vdev_devid : "<none>",
vd_devid != NULL ? vd_devid : "<none>");
cmn_err(CE_NOTE, "vdev_disk_open %s: update devid "
"from '%s' to '%s'",
vd->vdev_path != NULL ? vd->vdev_path : "?",
vd->vdev_devid != NULL ? vd->vdev_devid : "<none>",
vd_devid != NULL ? vd_devid : "<none>");
/*
* Remove and free any existing values.
*/
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 (vd->vdev_devid != NULL) {
spa_strfree(vd->vdev_devid);
vd->vdev_devid = NULL;
}
}
if (update) {
/*
* Install the new values.
*/
vd->vdev_devid = vd_devid;
dvd->vd_minor = minorname;
dvd->vd_devid = devid;
} else {
if (devid != NULL) {
ddi_devid_free(devid);
}
if (minorname != NULL) {
kmem_free(minorname, strlen(minorname) + 1);
}
}
}
/*
* 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);
}
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;
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 = capacity * blksz;
}
/*
* 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;
if (ldi_ioctl(dvd->vd_lh, DKIOC_CANFREE, (intptr_t)&can_free, FKIOCTL,
kcred, NULL) == 0 && can_free == 1) {
vd->vdev_has_trim = B_TRUE;
} else {
vd->vdev_has_trim = B_FALSE;
}
if (zfs_no_trim == 1)
vd->vdev_has_trim = B_FALSE;
/* Currently only supported for ZoL. */
vd->vdev_has_securetrim = B_FALSE;
/* Inform the ZIO pipeline that we are non-rotational */
vd->vdev_nonrot = B_FALSE;
if (ldi_prop_exists(dvd->vd_lh, DDI_PROP_DONTPASS | DDI_PROP_NOTPROM,
"device-solid-state")) {
if (ldi_prop_get_int(dvd->vd_lh,
LDI_DEV_T_ANY | DDI_PROP_DONTPASS | DDI_PROP_NOTPROM,
"device-solid-state", B_FALSE) != 0)
vd->vdev_nonrot = B_TRUE;
}
return (0);
}
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);
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;
vdev_disk_free(vd);
}
static int
vdev_disk_ldi_physio(ldi_handle_t vd_lh, caddr_t data,
size_t size, uint64_t offset, int flags)
{
buf_t *bp;
int error = 0;
if (vd_lh == NULL)
return (SET_ERROR(EINVAL));
ASSERT(flags & B_READ || flags & B_WRITE);
bp = getrbuf(KM_SLEEP);
bp->b_flags = flags | B_BUSY | B_NOCACHE | B_FAILFAST;
bp->b_bcount = size;
bp->b_un.b_addr = (void *)data;
bp->b_lblkno = lbtodb(offset);
bp->b_bufsize = size;
error = ldi_strategy(vd_lh, bp);
ASSERT(error == 0);
if ((error = biowait(bp)) == 0 && bp->b_resid != 0)
error = SET_ERROR(EIO);
freerbuf(bp);
return (error);
}
static int
vdev_disk_dumpio(vdev_t *vd, caddr_t data, size_t size,
uint64_t offset, uint64_t origoffset __unused, boolean_t doread,
boolean_t isdump)
{
vdev_disk_t *dvd = vd->vdev_tsd;
int flags = doread ? B_READ : B_WRITE;
/*
* If the vdev is closed, it's likely in the REMOVED or FAULTED state.
* Nothing to be done here but return failure.
*/
if (dvd == NULL || dvd->vd_ldi_offline) {
return (SET_ERROR(ENXIO));
}
ASSERT(vd->vdev_ops == &vdev_disk_ops);
offset += VDEV_LABEL_START_SIZE;
/*
* If in the context of an active crash dump, use the ldi_dump(9F)
* call instead of ldi_strategy(9F) as usual.
*/
if (isdump) {
ASSERT3P(dvd, !=, NULL);
return (ldi_dump(dvd->vd_lh, data, lbtodb(offset),
lbtodb(size)));
}
return (vdev_disk_ldi_physio(dvd->vd_lh, data, size, offset, flags));
}
static int
vdev_disk_io_intr(buf_t *bp)
{
vdev_buf_t *vb = (vdev_buf_t *)bp;
zio_t *zio = vb->vb_io;
/*
* The rest of the zio stack only deals with EIO, ECKSUM, and ENXIO.
* Rather than teach the rest of the stack about other error
* possibilities (EFAULT, etc), we normalize the error value here.
*/
zio->io_error = (geterror(bp) != 0 ? EIO : 0);
if (zio->io_error == 0 && bp->b_resid != 0)
zio->io_error = SET_ERROR(EIO);
if (zio->io_type == ZIO_TYPE_READ) {
abd_return_buf_copy(zio->io_abd, bp->b_un.b_addr, zio->io_size);
} else {
abd_return_buf(zio->io_abd, bp->b_un.b_addr, zio->io_size);
}
kmem_free(vb, sizeof (vdev_buf_t));
zio_delay_interrupt(zio);
return (0);
}
static void
vdev_disk_ioctl_free(zio_t *zio)
{
kmem_free(zio->io_vsd, sizeof (struct dk_callback));
}
static const zio_vsd_ops_t vdev_disk_vsd_ops = {
vdev_disk_ioctl_free,
zio_vsd_default_cksum_report
};
static void
vdev_disk_ioctl_done(void *zio_arg, int error)
{
zio_t *zio = zio_arg;
zio->io_error = error;
zio_interrupt(zio);
}
static void
vdev_disk_io_start(zio_t *zio)
{
vdev_t *vd = zio->io_vd;
vdev_disk_t *dvd = vd->vdev_tsd;
unsigned long trim_flags = 0;
vdev_buf_t *vb;
struct dk_callback *dkc;
buf_t *bp;
int error;
/*
* If the vdev is closed, it's likely in the REMOVED or FAULTED state.
* Nothing to be done here but return failure.
*/
if (dvd == NULL || dvd->vd_ldi_offline) {
zio->io_error = ENXIO;
zio_interrupt(zio);
return;
}
switch (zio->io_type) {
case ZIO_TYPE_IOCTL:
/* XXPOLICY */
if (!vdev_readable(vd)) {
zio->io_error = SET_ERROR(ENXIO);
zio_interrupt(zio);
return;
}
switch (zio->io_cmd) {
case DKIOCFLUSHWRITECACHE:
if (zfs_nocacheflush)
break;
if (vd->vdev_nowritecache) {
zio->io_error = SET_ERROR(ENOTSUP);
break;
}
zio->io_vsd = dkc = kmem_alloc(sizeof (*dkc), KM_SLEEP);
zio->io_vsd_ops = &vdev_disk_vsd_ops;
dkc->dkc_callback = vdev_disk_ioctl_done;
dkc->dkc_flag = FLUSH_VOLATILE;
dkc->dkc_cookie = zio;
error = ldi_ioctl(dvd->vd_lh, zio->io_cmd,
(uintptr_t)dkc, FKIOCTL, kcred, NULL);
if (error == 0) {
/*
* The ioctl will be done asychronously,
* and will call vdev_disk_ioctl_done()
* upon completion.
*/
return;
}
zio->io_error = error;
break;
default:
zio->io_error = SET_ERROR(ENOTSUP);
}
zio_execute(zio);
return;
case ZIO_TYPE_TRIM:
if (zfs_no_trim == 1 || !vd->vdev_has_trim) {
zio->io_error = SET_ERROR(ENOTSUP);
zio_execute(zio);
return;
}
/* Currently only supported on ZoL. */
ASSERT0(zio->io_trim_flags & ZIO_TRIM_SECURE);
/* dkioc_free_list_t is already declared to hold one entry */
dkioc_free_list_t dfl;
dfl.dfl_flags = 0;
dfl.dfl_num_exts = 1;
dfl.dfl_offset = 0;
dfl.dfl_exts[0].dfle_start = zio->io_offset;
dfl.dfl_exts[0].dfle_length = zio->io_size;
zio->io_error = ldi_ioctl(dvd->vd_lh, DKIOCFREE,
(uintptr_t)&dfl, FKIOCTL, kcred, NULL);
if (zio->io_error == ENOTSUP || zio->io_error == ENOTTY) {
/*
* The device must have changed and now TRIM is
* no longer supported.
*/
vd->vdev_has_trim = B_FALSE;
}
zio_interrupt(zio);