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zfs/lib/libzfs/libzfs_pool.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.
*/
#include <ctype.h>
#include <errno.h>
#include <devid.h>
#include <fcntl.h>
#include <libintl.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include <sys/efi_partition.h>
#include <sys/vtoc.h>
#include <sys/zfs_ioctl.h>
#include <dlfcn.h>
#include "zfs_namecheck.h"
#include "zfs_prop.h"
#include "libzfs_impl.h"
#include "zfs_comutil.h"
static int read_efi_label(nvlist_t *config, diskaddr_t *sb);
#define DISK_ROOT "/dev/dsk"
#define RDISK_ROOT "/dev/rdsk"
#define BACKUP_SLICE "s2"
typedef struct prop_flags {
int create:1; /* Validate property on creation */
int import:1; /* Validate property on import */
} prop_flags_t;
/*
* ====================================================================
* zpool property functions
* ====================================================================
*/
static int
zpool_get_all_props(zpool_handle_t *zhp)
{
zfs_cmd_t zc = { 0 };
libzfs_handle_t *hdl = zhp->zpool_hdl;
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
return (-1);
while (ioctl(hdl->libzfs_fd, ZFS_IOC_POOL_GET_PROPS, &zc) != 0) {
if (errno == ENOMEM) {
if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
zcmd_free_nvlists(&zc);
return (-1);
}
} else {
zcmd_free_nvlists(&zc);
return (-1);
}
}
if (zcmd_read_dst_nvlist(hdl, &zc, &zhp->zpool_props) != 0) {
zcmd_free_nvlists(&zc);
return (-1);
}
zcmd_free_nvlists(&zc);
return (0);
}
static int
zpool_props_refresh(zpool_handle_t *zhp)
{
nvlist_t *old_props;
old_props = zhp->zpool_props;
if (zpool_get_all_props(zhp) != 0)
return (-1);
nvlist_free(old_props);
return (0);
}
static char *
zpool_get_prop_string(zpool_handle_t *zhp, zpool_prop_t prop,
zprop_source_t *src)
{
nvlist_t *nv, *nvl;
uint64_t ival;
char *value;
zprop_source_t source;
nvl = zhp->zpool_props;
if (nvlist_lookup_nvlist(nvl, zpool_prop_to_name(prop), &nv) == 0) {
verify(nvlist_lookup_uint64(nv, ZPROP_SOURCE, &ival) == 0);
source = ival;
verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0);
} else {
source = ZPROP_SRC_DEFAULT;
if ((value = (char *)zpool_prop_default_string(prop)) == NULL)
value = "-";
}
if (src)
*src = source;
return (value);
}
uint64_t
zpool_get_prop_int(zpool_handle_t *zhp, zpool_prop_t prop, zprop_source_t *src)
{
nvlist_t *nv, *nvl;
uint64_t value;
zprop_source_t source;
if (zhp->zpool_props == NULL && zpool_get_all_props(zhp)) {
/*
* zpool_get_all_props() has most likely failed because
* the pool is faulted, but if all we need is the top level
* vdev's guid then get it from the zhp config nvlist.
*/
if ((prop == ZPOOL_PROP_GUID) &&
(nvlist_lookup_nvlist(zhp->zpool_config,
ZPOOL_CONFIG_VDEV_TREE, &nv) == 0) &&
(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &value)
== 0)) {
return (value);
}
return (zpool_prop_default_numeric(prop));
}
nvl = zhp->zpool_props;
if (nvlist_lookup_nvlist(nvl, zpool_prop_to_name(prop), &nv) == 0) {
verify(nvlist_lookup_uint64(nv, ZPROP_SOURCE, &value) == 0);
source = value;
verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
} else {
source = ZPROP_SRC_DEFAULT;
value = zpool_prop_default_numeric(prop);
}
if (src)
*src = source;
return (value);
}
/*
* Map VDEV STATE to printed strings.
*/
char *
zpool_state_to_name(vdev_state_t state, vdev_aux_t aux)
{
switch (state) {
case VDEV_STATE_CLOSED:
case VDEV_STATE_OFFLINE:
return (gettext("OFFLINE"));
case VDEV_STATE_REMOVED:
return (gettext("REMOVED"));
case VDEV_STATE_CANT_OPEN:
if (aux == VDEV_AUX_CORRUPT_DATA || aux == VDEV_AUX_BAD_LOG)
return (gettext("FAULTED"));
else if (aux == VDEV_AUX_SPLIT_POOL)
return (gettext("SPLIT"));
else
return (gettext("UNAVAIL"));
case VDEV_STATE_FAULTED:
return (gettext("FAULTED"));
case VDEV_STATE_DEGRADED:
return (gettext("DEGRADED"));
case VDEV_STATE_HEALTHY:
return (gettext("ONLINE"));
}
return (gettext("UNKNOWN"));
}
/*
* Get a zpool property value for 'prop' and return the value in
* a pre-allocated buffer.
*/
int
zpool_get_prop(zpool_handle_t *zhp, zpool_prop_t prop, char *buf, size_t len,
zprop_source_t *srctype)
{
uint64_t intval;
const char *strval;
zprop_source_t src = ZPROP_SRC_NONE;
nvlist_t *nvroot;
vdev_stat_t *vs;
uint_t vsc;
if (zpool_get_state(zhp) == POOL_STATE_UNAVAIL) {
switch (prop) {
case ZPOOL_PROP_NAME:
(void) strlcpy(buf, zpool_get_name(zhp), len);
break;
case ZPOOL_PROP_HEALTH:
(void) strlcpy(buf, "FAULTED", len);
break;
case ZPOOL_PROP_GUID:
intval = zpool_get_prop_int(zhp, prop, &src);
(void) snprintf(buf, len, "%llu", (u_longlong_t)intval);
break;
case ZPOOL_PROP_ALTROOT:
case ZPOOL_PROP_CACHEFILE:
if (zhp->zpool_props != NULL ||
zpool_get_all_props(zhp) == 0) {
(void) strlcpy(buf,
zpool_get_prop_string(zhp, prop, &src),
len);
if (srctype != NULL)
*srctype = src;
return (0);
}
/* FALLTHROUGH */
default:
(void) strlcpy(buf, "-", len);
break;
}
if (srctype != NULL)
*srctype = src;
return (0);
}
if (zhp->zpool_props == NULL && zpool_get_all_props(zhp) &&
prop != ZPOOL_PROP_NAME)
return (-1);
switch (zpool_prop_get_type(prop)) {
case PROP_TYPE_STRING:
(void) strlcpy(buf, zpool_get_prop_string(zhp, prop, &src),
len);
break;
case PROP_TYPE_NUMBER:
intval = zpool_get_prop_int(zhp, prop, &src);
switch (prop) {
case ZPOOL_PROP_SIZE:
case ZPOOL_PROP_ALLOCATED:
case ZPOOL_PROP_FREE:
(void) zfs_nicenum(intval, buf, len);
break;
case ZPOOL_PROP_CAPACITY:
(void) snprintf(buf, len, "%llu%%",
(u_longlong_t)intval);
break;
case ZPOOL_PROP_DEDUPRATIO:
(void) snprintf(buf, len, "%llu.%02llux",
(u_longlong_t)(intval / 100),
(u_longlong_t)(intval % 100));
break;
case ZPOOL_PROP_HEALTH:
verify(nvlist_lookup_nvlist(zpool_get_config(zhp, NULL),
ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
verify(nvlist_lookup_uint64_array(nvroot,
ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc)
== 0);
(void) strlcpy(buf, zpool_state_to_name(intval,
vs->vs_aux), len);
break;
default:
(void) snprintf(buf, len, "%llu", (u_longlong_t)intval);
}
break;
case PROP_TYPE_INDEX:
intval = zpool_get_prop_int(zhp, prop, &src);
if (zpool_prop_index_to_string(prop, intval, &strval)
!= 0)
return (-1);
(void) strlcpy(buf, strval, len);
break;
default:
abort();
}
if (srctype)
*srctype = src;
return (0);
}
/*
* Check if the bootfs name has the same pool name as it is set to.
* Assuming bootfs is a valid dataset name.
*/
static boolean_t
bootfs_name_valid(const char *pool, char *bootfs)
{
int len = strlen(pool);
if (!zfs_name_valid(bootfs, ZFS_TYPE_FILESYSTEM|ZFS_TYPE_SNAPSHOT))
return (B_FALSE);
if (strncmp(pool, bootfs, len) == 0 &&
(bootfs[len] == '/' || bootfs[len] == '\0'))
return (B_TRUE);
return (B_FALSE);
}
/*
* Inspect the configuration to determine if any of the devices contain
* an EFI label.
*/
static boolean_t
pool_uses_efi(nvlist_t *config)
{
nvlist_t **child;
uint_t c, children;
if (nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_CHILDREN,
&child, &children) != 0)
return (read_efi_label(config, NULL) >= 0);
for (c = 0; c < children; c++) {
if (pool_uses_efi(child[c]))
return (B_TRUE);
}
return (B_FALSE);
}
static boolean_t
pool_is_bootable(zpool_handle_t *zhp)
{
char bootfs[ZPOOL_MAXNAMELEN];
return (zpool_get_prop(zhp, ZPOOL_PROP_BOOTFS, bootfs,
sizeof (bootfs), NULL) == 0 && strncmp(bootfs, "-",
sizeof (bootfs)) != 0);
}
/*
* Given an nvlist of zpool properties to be set, validate that they are
* correct, and parse any numeric properties (index, boolean, etc) if they are
* specified as strings.
*/
static nvlist_t *
zpool_valid_proplist(libzfs_handle_t *hdl, const char *poolname,
nvlist_t *props, uint64_t version, prop_flags_t flags, char *errbuf)
{
nvpair_t *elem;
nvlist_t *retprops;
zpool_prop_t prop;
char *strval;
uint64_t intval;
char *slash;
struct stat64 statbuf;
zpool_handle_t *zhp;
nvlist_t *nvroot;
if (nvlist_alloc(&retprops, NV_UNIQUE_NAME, 0) != 0) {
(void) no_memory(hdl);
return (NULL);
}
elem = NULL;
while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
const char *propname = nvpair_name(elem);
/*
* Make sure this property is valid and applies to this type.
*/
if ((prop = zpool_name_to_prop(propname)) == ZPROP_INVAL) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"invalid property '%s'"), propname);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
if (zpool_prop_readonly(prop)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "'%s' "
"is readonly"), propname);
(void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
goto error;
}
if (zprop_parse_value(hdl, elem, prop, ZFS_TYPE_POOL, retprops,
&strval, &intval, errbuf) != 0)
goto error;
/*
* Perform additional checking for specific properties.
*/
switch (prop) {
case ZPOOL_PROP_VERSION:
if (intval < version || intval > SPA_VERSION) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"property '%s' number %d is invalid."),
propname, intval);
(void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
goto error;
}
break;
case ZPOOL_PROP_BOOTFS:
if (flags.create || flags.import) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"property '%s' cannot be set at creation "
"or import time"), propname);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
if (version < SPA_VERSION_BOOTFS) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"pool must be upgraded to support "
"'%s' property"), propname);
(void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
goto error;
}
/*
* bootfs property value has to be a dataset name and
* the dataset has to be in the same pool as it sets to.
*/
if (strval[0] != '\0' && !bootfs_name_valid(poolname,
strval)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "'%s' "
"is an invalid name"), strval);
(void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
goto error;
}
if ((zhp = zpool_open_canfail(hdl, poolname)) == NULL) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"could not open pool '%s'"), poolname);
(void) zfs_error(hdl, EZFS_OPENFAILED, errbuf);
goto error;
}
verify(nvlist_lookup_nvlist(zpool_get_config(zhp, NULL),
ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
/*
* bootfs property cannot be set on a disk which has
* been EFI labeled.
*/
if (pool_uses_efi(nvroot)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"property '%s' not supported on "
"EFI labeled devices"), propname);
(void) zfs_error(hdl, EZFS_POOL_NOTSUP, errbuf);
zpool_close(zhp);
goto error;
}
zpool_close(zhp);
break;
case ZPOOL_PROP_ALTROOT:
if (!flags.create && !flags.import) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"property '%s' can only be set during pool "
"creation or import"), propname);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
if (strval[0] != '/') {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"bad alternate root '%s'"), strval);
(void) zfs_error(hdl, EZFS_BADPATH, errbuf);
goto error;
}
break;
case ZPOOL_PROP_CACHEFILE:
if (strval[0] == '\0')
break;
if (strcmp(strval, "none") == 0)
break;
if (strval[0] != '/') {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"property '%s' must be empty, an "
"absolute path, or 'none'"), propname);
(void) zfs_error(hdl, EZFS_BADPATH, errbuf);
goto error;
}
slash = strrchr(strval, '/');
if (slash[1] == '\0' || strcmp(slash, "/.") == 0 ||
strcmp(slash, "/..") == 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' is not a valid file"), strval);
(void) zfs_error(hdl, EZFS_BADPATH, errbuf);
goto error;
}
*slash = '\0';
if (strval[0] != '\0' &&
(stat64(strval, &statbuf) != 0 ||
!S_ISDIR(statbuf.st_mode))) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' is not a valid directory"),
strval);
(void) zfs_error(hdl, EZFS_BADPATH, errbuf);
goto error;
}
*slash = '/';
break;
case ZPOOL_PROP_READONLY:
if (!flags.import) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"property '%s' can only be set at "
"import time"), propname);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
break;
}
}
return (retprops);
error:
nvlist_free(retprops);
return (NULL);
}
/*
* Set zpool property : propname=propval.
*/
int
zpool_set_prop(zpool_handle_t *zhp, const char *propname, const char *propval)
{
zfs_cmd_t zc = { 0 };
int ret = -1;
char errbuf[1024];
nvlist_t *nvl = NULL;
nvlist_t *realprops;
uint64_t version;
prop_flags_t flags = { 0 };
(void) snprintf(errbuf, sizeof (errbuf),
dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
zhp->zpool_name);
if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
return (no_memory(zhp->zpool_hdl));
if (nvlist_add_string(nvl, propname, propval) != 0) {
nvlist_free(nvl);
return (no_memory(zhp->zpool_hdl));
}
version = zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL);
if ((realprops = zpool_valid_proplist(zhp->zpool_hdl,
zhp->zpool_name, nvl, version, flags, errbuf)) == NULL) {
nvlist_free(nvl);
return (-1);
}
nvlist_free(nvl);
nvl = realprops;
/*
* Execute the corresponding ioctl() to set this property.
*/
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
if (zcmd_write_src_nvlist(zhp->zpool_hdl, &zc, nvl) != 0) {
nvlist_free(nvl);
return (-1);
}
ret = zfs_ioctl(zhp->zpool_hdl, ZFS_IOC_POOL_SET_PROPS, &zc);
zcmd_free_nvlists(&zc);
nvlist_free(nvl);
if (ret)
(void) zpool_standard_error(zhp->zpool_hdl, errno, errbuf);
else
(void) zpool_props_refresh(zhp);
return (ret);
}
int
zpool_expand_proplist(zpool_handle_t *zhp, zprop_list_t **plp)
{
libzfs_handle_t *hdl = zhp->zpool_hdl;
zprop_list_t *entry;
char buf[ZFS_MAXPROPLEN];
if (zprop_expand_list(hdl, plp, ZFS_TYPE_POOL) != 0)
return (-1);
for (entry = *plp; entry != NULL; entry = entry->pl_next) {
if (entry->pl_fixed)
continue;
if (entry->pl_prop != ZPROP_INVAL &&
zpool_get_prop(zhp, entry->pl_prop, buf, sizeof (buf),
NULL) == 0) {
if (strlen(buf) > entry->pl_width)
entry->pl_width = strlen(buf);
}
}
return (0);
}
/*
* Don't start the slice at the default block of 34; many storage
* devices will use a stripe width of 128k, so start there instead.
*/
#define NEW_START_BLOCK 256
/*
* Validate the given pool name, optionally putting an extended error message in
* 'buf'.
*/
boolean_t
zpool_name_valid(libzfs_handle_t *hdl, boolean_t isopen, const char *pool)
{
namecheck_err_t why;
char what;
int ret;
ret = pool_namecheck(pool, &why, &what);
/*
* The rules for reserved pool names were extended at a later point.
* But we need to support users with existing pools that may now be
* invalid. So we only check for this expanded set of names during a
* create (or import), and only in userland.
*/
if (ret == 0 && !isopen &&
(strncmp(pool, "mirror", 6) == 0 ||
strncmp(pool, "raidz", 5) == 0 ||
strncmp(pool, "spare", 5) == 0 ||
strcmp(pool, "log") == 0)) {
if (hdl != NULL)
zfs_error_aux(hdl,
dgettext(TEXT_DOMAIN, "name is reserved"));
return (B_FALSE);
}
if (ret != 0) {
if (hdl != NULL) {
switch (why) {
case NAME_ERR_TOOLONG:
zfs_error_aux(hdl,
dgettext(TEXT_DOMAIN, "name is too long"));
break;
case NAME_ERR_INVALCHAR:
zfs_error_aux(hdl,
dgettext(TEXT_DOMAIN, "invalid character "
"'%c' in pool name"), what);
break;
case NAME_ERR_NOLETTER:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"name must begin with a letter"));
break;
case NAME_ERR_RESERVED:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"name is reserved"));
break;
case NAME_ERR_DISKLIKE:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"pool name is reserved"));
break;
case NAME_ERR_LEADING_SLASH:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"leading slash in name"));
break;
case NAME_ERR_EMPTY_COMPONENT:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"empty component in name"));
break;
case NAME_ERR_TRAILING_SLASH:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"trailing slash in name"));
break;
case NAME_ERR_MULTIPLE_AT:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"multiple '@' delimiters in name"));
break;
}
}
return (B_FALSE);
}
return (B_TRUE);
}
/*
* Open a handle to the given pool, even if the pool is currently in the FAULTED
* state.
*/
zpool_handle_t *
zpool_open_canfail(libzfs_handle_t *hdl, const char *pool)
{
zpool_handle_t *zhp;
boolean_t missing;
/*
* Make sure the pool name is valid.
*/
if (!zpool_name_valid(hdl, B_TRUE, pool)) {
(void) zfs_error_fmt(hdl, EZFS_INVALIDNAME,
dgettext(TEXT_DOMAIN, "cannot open '%s'"),
pool);
return (NULL);
}
if ((zhp = zfs_alloc(hdl, sizeof (zpool_handle_t))) == NULL)
return (NULL);
zhp->zpool_hdl = hdl;
(void) strlcpy(zhp->zpool_name, pool, sizeof (zhp->zpool_name));
if (zpool_refresh_stats(zhp, &missing) != 0) {
zpool_close(zhp);
return (NULL);
}
if (missing) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "no such pool"));
(void) zfs_error_fmt(hdl, EZFS_NOENT,
dgettext(TEXT_DOMAIN, "cannot open '%s'"), pool);
zpool_close(zhp);
return (NULL);
}
return (zhp);
}
/*
* Like the above, but silent on error. Used when iterating over pools (because
* the configuration cache may be out of date).
*/
int
zpool_open_silent(libzfs_handle_t *hdl, const char *pool, zpool_handle_t **ret)
{
zpool_handle_t *zhp;
boolean_t missing;
if ((zhp = zfs_alloc(hdl, sizeof (zpool_handle_t))) == NULL)
return (-1);
zhp->zpool_hdl = hdl;
(void) strlcpy(zhp->zpool_name, pool, sizeof (zhp->zpool_name));
if (zpool_refresh_stats(zhp, &missing) != 0) {
zpool_close(zhp);
return (-1);
}
if (missing) {
zpool_close(zhp);
*ret = NULL;
return (0);
}
*ret = zhp;
return (0);
}
/*
* Similar to zpool_open_canfail(), but refuses to open pools in the faulted
* state.
*/
zpool_handle_t *
zpool_open(libzfs_handle_t *hdl, const char *pool)
{
zpool_handle_t *zhp;
if ((zhp = zpool_open_canfail(hdl, pool)) == NULL)
return (NULL);
if (zhp->zpool_state == POOL_STATE_UNAVAIL) {
(void) zfs_error_fmt(hdl, EZFS_POOLUNAVAIL,
dgettext(TEXT_DOMAIN, "cannot open '%s'"), zhp->zpool_name);
zpool_close(zhp);
return (NULL);
}
return (zhp);
}
/*
* Close the handle. Simply frees the memory associated with the handle.
*/
void
zpool_close(zpool_handle_t *zhp)
{
if (zhp->zpool_config)
nvlist_free(zhp->zpool_config);
if (zhp->zpool_old_config)
nvlist_free(zhp->zpool_old_config);
if (zhp->zpool_props)
nvlist_free(zhp->zpool_props);
free(zhp);
}
/*
* Return the name of the pool.
*/
const char *
zpool_get_name(zpool_handle_t *zhp)
{
return (zhp->zpool_name);
}
/*
* Return the state of the pool (ACTIVE or UNAVAILABLE)
*/
int
zpool_get_state(zpool_handle_t *zhp)
{
return (zhp->zpool_state);
}
/*
* Create the named pool, using the provided vdev list. It is assumed
* that the consumer has already validated the contents of the nvlist, so we
* don't have to worry about error semantics.
*/
int
zpool_create(libzfs_handle_t *hdl, const char *pool, nvlist_t *nvroot,
nvlist_t *props, nvlist_t *fsprops)
{
zfs_cmd_t zc = { 0 };
nvlist_t *zc_fsprops = NULL;
nvlist_t *zc_props = NULL;
char msg[1024];
char *altroot;
int ret = -1;
(void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
"cannot create '%s'"), pool);
if (!zpool_name_valid(hdl, B_FALSE, pool))
return (zfs_error(hdl, EZFS_INVALIDNAME, msg));
if (zcmd_write_conf_nvlist(hdl, &zc, nvroot) != 0)
return (-1);
if (props) {
prop_flags_t flags = { .create = B_TRUE, .import = B_FALSE };
if ((zc_props = zpool_valid_proplist(hdl, pool, props,
SPA_VERSION_1, flags, msg)) == NULL) {
goto create_failed;
}
}
if (fsprops) {
uint64_t zoned;
char *zonestr;
zoned = ((nvlist_lookup_string(fsprops,
zfs_prop_to_name(ZFS_PROP_ZONED), &zonestr) == 0) &&
strcmp(zonestr, "on") == 0);
if ((zc_fsprops = zfs_valid_proplist(hdl,
ZFS_TYPE_FILESYSTEM, fsprops, zoned, NULL, msg)) == NULL) {
goto create_failed;
}
if (!zc_props &&
(nvlist_alloc(&zc_props, NV_UNIQUE_NAME, 0) != 0)) {
goto create_failed;
}
if (nvlist_add_nvlist(zc_props,
ZPOOL_ROOTFS_PROPS, zc_fsprops) != 0) {
goto create_failed;
}
}
if (zc_props && zcmd_write_src_nvlist(hdl, &zc, zc_props) != 0)
goto create_failed;
(void) strlcpy(zc.zc_name, pool, sizeof (zc.zc_name));
if ((ret = zfs_ioctl(hdl, ZFS_IOC_POOL_CREATE, &zc)) != 0) {
zcmd_free_nvlists(&zc);
nvlist_free(zc_props);
nvlist_free(zc_fsprops);
switch (errno) {
case EBUSY:
/*
* This can happen if the user has specified the same
* device multiple times. We can't reliably detect this
* until we try to add it and see we already have a
* label.
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"one or more vdevs refer to the same device"));
return (zfs_error(hdl, EZFS_BADDEV, msg));
case EOVERFLOW:
/*
* This occurs when one of the devices is below
* SPA_MINDEVSIZE. Unfortunately, we can't detect which
* device was the problem device since there's no
* reliable way to determine device size from userland.
*/
{
char buf[64];
zfs_nicenum(SPA_MINDEVSIZE, buf, sizeof (buf));
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"one or more devices is less than the "
"minimum size (%s)"), buf);
}
return (zfs_error(hdl, EZFS_BADDEV, msg));
case ENOSPC:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"one or more devices is out of space"));
return (zfs_error(hdl, EZFS_BADDEV, msg));
case ENOTBLK:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"cache device must be a disk or disk slice"));
return (zfs_error(hdl, EZFS_BADDEV, msg));
default:
return (zpool_standard_error(hdl, errno, msg));
}
}
/*
* If this is an alternate root pool, then we automatically set the
* mountpoint of the root dataset to be '/'.
*/
if (nvlist_lookup_string(props, zpool_prop_to_name(ZPOOL_PROP_ALTROOT),
&altroot) == 0) {
zfs_handle_t *zhp;
verify((zhp = zfs_open(hdl, pool, ZFS_TYPE_DATASET)) != NULL);
verify(zfs_prop_set(zhp, zfs_prop_to_name(ZFS_PROP_MOUNTPOINT),
"/") == 0);
zfs_close(zhp);
}
create_failed:
zcmd_free_nvlists(&zc);
nvlist_free(zc_props);
nvlist_free(zc_fsprops);
return (ret);
}
/*
* Destroy the given pool. It is up to the caller to ensure that there are no
* datasets left in the pool.
*/
int
zpool_destroy(zpool_handle_t *zhp)
{
zfs_cmd_t zc = { 0 };
zfs_handle_t *zfp = NULL;
libzfs_handle_t *hdl = zhp->zpool_hdl;
char msg[1024];
if (zhp->zpool_state == POOL_STATE_ACTIVE &&
(zfp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_FILESYSTEM)) == NULL)
return (-1);
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
if (zfs_ioctl(hdl, ZFS_IOC_POOL_DESTROY, &zc) != 0) {
(void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
"cannot destroy '%s'"), zhp->zpool_name);
if (errno == EROFS) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"one or more devices is read only"));
(void) zfs_error(hdl, EZFS_BADDEV, msg);
} else {
(void) zpool_standard_error(hdl, errno, msg);
}
if (zfp)
zfs_close(zfp);
return (-1);
}
if (zfp) {
remove_mountpoint(zfp);
zfs_close(zfp);
}
return (0);
}
/*
* Add the given vdevs to the pool. The caller must have already performed the
* necessary verification to ensure that the vdev specification is well-formed.
*/
int
zpool_add(zpool_handle_t *zhp, nvlist_t *nvroot)
{
zfs_cmd_t zc = { 0 };
int ret;
libzfs_handle_t *hdl = zhp->zpool_hdl;
char msg[1024];
nvlist_t **spares, **l2cache;
uint_t nspares, nl2cache;
(void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
"cannot add to '%s'"), zhp->zpool_name);
if (zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL) <
SPA_VERSION_SPARES &&
nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
&spares, &nspares) == 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "pool must be "
"upgraded to add hot spares"));
return (zfs_error(hdl, EZFS_BADVERSION, msg));
}
if (pool_is_bootable(zhp) && nvlist_lookup_nvlist_array(nvroot,
ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0) {
uint64_t s;
for (s = 0; s < nspares; s++) {
char *path;
if (nvlist_lookup_string(spares[s], ZPOOL_CONFIG_PATH,
&path) == 0 && pool_uses_efi(spares[s])) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"device '%s' contains an EFI label and "
"cannot be used on root pools."),
zpool_vdev_name(hdl, NULL, spares[s],
B_FALSE));
return (zfs_error(hdl, EZFS_POOL_NOTSUP, msg));
}
}
}
if (zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL) <
SPA_VERSION_L2CACHE &&
nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
&l2cache, &nl2cache) == 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "pool must be "
"upgraded to add cache devices"));
return (zfs_error(hdl, EZFS_BADVERSION, msg));
}
if (zcmd_write_conf_nvlist(hdl, &zc, nvroot) != 0)
return (-1);
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
if (zfs_ioctl(hdl, ZFS_IOC_VDEV_ADD, &zc) != 0) {
switch (errno) {
case EBUSY:
/*
* This can happen if the user has specified the same
* device multiple times. We can't reliably detect this
* until we try to add it and see we already have a
* label.
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"one or more vdevs refer to the same device"));
(void) zfs_error(hdl, EZFS_BADDEV, msg);
break;
case EOVERFLOW:
/*
* This occurrs when one of the devices is below
* SPA_MINDEVSIZE. Unfortunately, we can't detect which
* device was the problem device since there's no
* reliable way to determine device size from userland.
*/
{
char buf[64];
zfs_nicenum(SPA_MINDEVSIZE, buf, sizeof (buf));
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"device is less than the minimum "
"size (%s)"), buf);
}
(void) zfs_error(hdl, EZFS_BADDEV, msg);
break;
case ENOTSUP:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"pool must be upgraded to add these vdevs"));
(void) zfs_error(hdl, EZFS_BADVERSION, msg);
break;
case EDOM:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"root pool can not have multiple vdevs"
" or separate logs"));
(void) zfs_error(hdl, EZFS_POOL_NOTSUP, msg);
break;
case ENOTBLK:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"cache device must be a disk or disk slice"));
(void) zfs_error(hdl, EZFS_BADDEV, msg);
break;
default:
(void) zpool_standard_error(hdl, errno, msg);
}
ret = -1;
} else {
ret = 0;
}
zcmd_free_nvlists(&zc);
return (ret);
}
/*
* Exports the pool from the system. The caller must ensure that there are no
* mounted datasets in the pool.
*/
int
zpool_export_common(zpool_handle_t *zhp, boolean_t force, boolean_t hardforce)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
(void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
"cannot export '%s'"), zhp->zpool_name);
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
zc.zc_cookie = force;
zc.zc_guid = hardforce;
if (zfs_ioctl(zhp->zpool_hdl, ZFS_IOC_POOL_EXPORT, &zc) != 0) {
switch (errno) {
case EXDEV:
zfs_error_aux(zhp->zpool_hdl, dgettext(TEXT_DOMAIN,
"use '-f' to override the following errors:\n"
"'%s' has an active shared spare which could be"
" used by other pools once '%s' is exported."),
zhp->zpool_name, zhp->zpool_name);
return (zfs_error(zhp->zpool_hdl, EZFS_ACTIVE_SPARE,
msg));
default:
return (zpool_standard_error_fmt(zhp->zpool_hdl, errno,
msg));
}
}
return (0);
}
int
zpool_export(zpool_handle_t *zhp, boolean_t force)
{
return (zpool_export_common(zhp, force, B_FALSE));
}
int
zpool_export_force(zpool_handle_t *zhp)
{
return (zpool_export_common(zhp, B_TRUE, B_TRUE));
}
static void
zpool_rewind_exclaim(libzfs_handle_t *hdl, const char *name, boolean_t dryrun,
nvlist_t *config)
{
nvlist_t *nv = NULL;
uint64_t rewindto;
int64_t loss = -1;
struct tm t;
char timestr[128];
if (!hdl->libzfs_printerr || config == NULL)
return;
if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, &nv) != 0)
return;
if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_LOAD_TIME, &rewindto) != 0)
return;
(void) nvlist_lookup_int64(nv, ZPOOL_CONFIG_REWIND_TIME, &loss);
if (localtime_r((time_t *)&rewindto, &t) != NULL &&
strftime(timestr, 128, "%c", &t) != 0) {
if (dryrun) {
(void) printf(dgettext(TEXT_DOMAIN,
"Would be able to return %s "
"to its state as of %s.\n"),
name, timestr);
} else {
(void) printf(dgettext(TEXT_DOMAIN,
"Pool %s returned to its state as of %s.\n"),
name, timestr);
}
if (loss > 120) {
(void) printf(dgettext(TEXT_DOMAIN,
"%s approximately %lld "),
dryrun ? "Would discard" : "Discarded",
((longlong_t)loss + 30) / 60);
(void) printf(dgettext(TEXT_DOMAIN,
"minutes of transactions.\n"));
} else if (loss > 0) {
(void) printf(dgettext(TEXT_DOMAIN,
"%s approximately %lld "),
dryrun ? "Would discard" : "Discarded",
(longlong_t)loss);
(void) printf(dgettext(TEXT_DOMAIN,
"seconds of transactions.\n"));
}
}
}
void
zpool_explain_recover(libzfs_handle_t *hdl, const char *name, int reason,
nvlist_t *config)
{
nvlist_t *nv = NULL;
int64_t loss = -1;
uint64_t edata = UINT64_MAX;
uint64_t rewindto;
struct tm t;
char timestr[128];
if (!hdl->libzfs_printerr)
return;
if (reason >= 0)
(void) printf(dgettext(TEXT_DOMAIN, "action: "));
else
(void) printf(dgettext(TEXT_DOMAIN, "\t"));
/* All attempted rewinds failed if ZPOOL_CONFIG_LOAD_TIME missing */
if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, &nv) != 0 ||
nvlist_lookup_uint64(nv, ZPOOL_CONFIG_LOAD_TIME, &rewindto) != 0)
goto no_info;
(void) nvlist_lookup_int64(nv, ZPOOL_CONFIG_REWIND_TIME, &loss);
(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_LOAD_DATA_ERRORS,
&edata);
(void) printf(dgettext(TEXT_DOMAIN,
"Recovery is possible, but will result in some data loss.\n"));
if (localtime_r((time_t *)&rewindto, &t) != NULL &&
strftime(timestr, 128, "%c", &t) != 0) {
(void) printf(dgettext(TEXT_DOMAIN,
"\tReturning the pool to its state as of %s\n"
"\tshould correct the problem. "),
timestr);
} else {
(void) printf(dgettext(TEXT_DOMAIN,
"\tReverting the pool to an earlier state "
"should correct the problem.\n\t"));
}
if (loss > 120) {
(void) printf(dgettext(TEXT_DOMAIN,
"Approximately %lld minutes of data\n"
"\tmust be discarded, irreversibly. "),
((longlong_t)loss + 30) / 60);
} else if (loss > 0) {
(void) printf(dgettext(TEXT_DOMAIN,
"Approximately %lld seconds of data\n"
"\tmust be discarded, irreversibly. "),
(longlong_t)loss);
}
if (edata != 0 && edata != UINT64_MAX) {
if (edata == 1) {
(void) printf(dgettext(TEXT_DOMAIN,
"After rewind, at least\n"
"\tone persistent user-data error will remain. "));
} else {
(void) printf(dgettext(TEXT_DOMAIN,
"After rewind, several\n"
"\tpersistent user-data errors will remain. "));
}
}
(void) printf(dgettext(TEXT_DOMAIN,
"Recovery can be attempted\n\tby executing 'zpool %s -F %s'. "),
reason >= 0 ? "clear" : "import", name);
(void) printf(dgettext(TEXT_DOMAIN,
"A scrub of the pool\n"
"\tis strongly recommended after recovery.\n"));
return;
no_info:
(void) printf(dgettext(TEXT_DOMAIN,
"Destroy and re-create the pool from\n\ta backup source.\n"));
}
/*
* zpool_import() is a contracted interface. Should be kept the same
* if possible.
*
* Applications should use zpool_import_props() to import a pool with
* new properties value to be set.
*/
int
zpool_import(libzfs_handle_t *hdl, nvlist_t *config, const char *newname,
char *altroot)
{
nvlist_t *props = NULL;
int ret;
if (altroot != NULL) {
if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
return (zfs_error_fmt(hdl, EZFS_NOMEM,
dgettext(TEXT_DOMAIN, "cannot import '%s'"),
newname));
}
if (nvlist_add_string(props,
zpool_prop_to_name(ZPOOL_PROP_ALTROOT), altroot) != 0 ||
nvlist_add_string(props,
zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), "none") != 0) {
nvlist_free(props);
return (zfs_error_fmt(hdl, EZFS_NOMEM,
dgettext(TEXT_DOMAIN, "cannot import '%s'"),
newname));
}
}
ret = zpool_import_props(hdl, config, newname, props,
ZFS_IMPORT_NORMAL);
if (props)
nvlist_free(props);
return (ret);
}
static void
print_vdev_tree(libzfs_handle_t *hdl, const char *name, nvlist_t *nv,
int indent)
{
nvlist_t **child;
uint_t c, children;
char *vname;
uint64_t is_log = 0;
(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG,
&is_log);
if (name != NULL)
(void) printf("\t%*s%s%s\n", indent, "", name,
is_log ? " [log]" : "");
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
&child, &children) != 0)
return;
for (c = 0; c < children; c++) {
vname = zpool_vdev_name(hdl, NULL, child[c], B_TRUE);
print_vdev_tree(hdl, vname, child[c], indent + 2);
free(vname);
}
}
/*
* Import the given pool using the known configuration and a list of
* properties to be set. The configuration should have come from
* zpool_find_import(). The 'newname' parameters control whether the pool
* is imported with a different name.
*/
int
zpool_import_props(libzfs_handle_t *hdl, nvlist_t *config, const char *newname,
nvlist_t *props, int flags)
{
zfs_cmd_t zc = { 0 };
zpool_rewind_policy_t policy;
nvlist_t *nv = NULL;
nvlist_t *nvinfo = NULL;
nvlist_t *missing = NULL;
char *thename;
char *origname;
int ret;
int error = 0;
char errbuf[1024];
verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
&origname) == 0);
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot import pool '%s'"), origname);
if (newname != NULL) {
if (!zpool_name_valid(hdl, B_FALSE, newname))
return (zfs_error_fmt(hdl, EZFS_INVALIDNAME,
dgettext(TEXT_DOMAIN, "cannot import '%s'"),
newname));
thename = (char *)newname;
} else {
thename = origname;
}
if (props) {
uint64_t version;
prop_flags_t flags = { .create = B_FALSE, .import = B_TRUE };
verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
&version) == 0);
if ((props = zpool_valid_proplist(hdl, origname,
props, version, flags, errbuf)) == NULL) {
return (-1);
} else if (zcmd_write_src_nvlist(hdl, &zc, props) != 0) {
nvlist_free(props);
return (-1);
}
}
(void) strlcpy(zc.zc_name, thename, sizeof (zc.zc_name));
verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
&zc.zc_guid) == 0);
if (zcmd_write_conf_nvlist(hdl, &zc, config) != 0) {
nvlist_free(props);
return (-1);
}
if (zcmd_alloc_dst_nvlist(hdl, &zc, zc.zc_nvlist_conf_size * 2) != 0) {
nvlist_free(props);
return (-1);
}
zc.zc_cookie = flags;
while ((ret = zfs_ioctl(hdl, ZFS_IOC_POOL_IMPORT, &zc)) != 0 &&
errno == ENOMEM) {
if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
zcmd_free_nvlists(&zc);
return (-1);
}
}
if (ret != 0)
error = errno;
(void) zcmd_read_dst_nvlist(hdl, &zc, &nv);
zpool_get_rewind_policy(config, &policy);
if (error) {
char desc[1024];
/*
* Dry-run failed, but we print out what success
* looks like if we found a best txg
*/
if (policy.zrp_request & ZPOOL_TRY_REWIND) {
zpool_rewind_exclaim(hdl, newname ? origname : thename,
B_TRUE, nv);
nvlist_free(nv);
return (-1);
}
if (newname == NULL)
(void) snprintf(desc, sizeof (desc),
dgettext(TEXT_DOMAIN, "cannot import '%s'"),
thename);
else
(void) snprintf(desc, sizeof (desc),
dgettext(TEXT_DOMAIN, "cannot import '%s' as '%s'"),
origname, thename);
switch (error) {
case ENOTSUP:
/*
* Unsupported version.
*/
(void) zfs_error(hdl, EZFS_BADVERSION, desc);
break;
case EINVAL:
(void) zfs_error(hdl, EZFS_INVALCONFIG, desc);
break;
case EROFS:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"one or more devices is read only"));
(void) zfs_error(hdl, EZFS_BADDEV, desc);
break;
case ENXIO:
if (nv && nvlist_lookup_nvlist(nv,
ZPOOL_CONFIG_LOAD_INFO, &nvinfo) == 0 &&
nvlist_lookup_nvlist(nvinfo,
ZPOOL_CONFIG_MISSING_DEVICES, &missing) == 0) {
(void) printf(dgettext(TEXT_DOMAIN,
"The devices below are missing, use "
"'-m' to import the pool anyway:\n"));
print_vdev_tree(hdl, NULL, missing, 2);
(void) printf("\n");
}
(void) zpool_standard_error(hdl, error, desc);
break;
case EEXIST:
(void) zpool_standard_error(hdl, error, desc);
break;
default:
(void) zpool_standard_error(hdl, error, desc);
zpool_explain_recover(hdl,
newname ? origname : thename, -error, nv);
break;
}
nvlist_free(nv);
ret = -1;
} else {
zpool_handle_t *zhp;
/*
* This should never fail, but play it safe anyway.
*/
if (zpool_open_silent(hdl, thename, &zhp) != 0)
ret = -1;
else if (zhp != NULL)
zpool_close(zhp);
if (policy.zrp_request &
(ZPOOL_DO_REWIND | ZPOOL_TRY_REWIND)) {
zpool_rewind_exclaim(hdl, newname ? origname : thename,
((policy.zrp_request & ZPOOL_TRY_REWIND) != 0), nv);
}
nvlist_free(nv);
return (0);
}
zcmd_free_nvlists(&zc);
nvlist_free(props);
return (ret);
}
/*
* Scan the pool.
*/
int
zpool_scan(zpool_handle_t *zhp, pool_scan_func_t func)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
libzfs_handle_t *hdl = zhp->zpool_hdl;
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
zc.zc_cookie = func;
if (zfs_ioctl(hdl, ZFS_IOC_POOL_SCAN, &zc) == 0 ||
(errno == ENOENT && func != POOL_SCAN_NONE))
return (0);
if (func == POOL_SCAN_SCRUB) {
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot scrub %s"), zc.zc_name);
} else if (func == POOL_SCAN_NONE) {
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot cancel scrubbing %s"),
zc.zc_name);
} else {
assert(!"unexpected result");
}
if (errno == EBUSY) {
nvlist_t *nvroot;
pool_scan_stat_t *ps = NULL;
uint_t psc;
verify(nvlist_lookup_nvlist(zhp->zpool_config,
ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
(void) nvlist_lookup_uint64_array(nvroot,
ZPOOL_CONFIG_SCAN_STATS, (uint64_t **)&ps, &psc);
if (ps && ps->pss_func == POOL_SCAN_SCRUB)
return (zfs_error(hdl, EZFS_SCRUBBING, msg));
else
return (zfs_error(hdl, EZFS_RESILVERING, msg));
} else if (errno == ENOENT) {
return (zfs_error(hdl, EZFS_NO_SCRUB, msg));
} else {
return (zpool_standard_error(hdl, errno, msg));
}
}
/*
* This provides a very minimal check whether a given string is likely a
* c#t#d# style string. Users of this are expected to do their own
* verification of the s# part.
*/
#define CTD_CHECK(str) (str && str[0] == 'c' && isdigit(str[1]))
/*
* More elaborate version for ones which may start with "/dev/dsk/"
* and the like.
*/
static int
ctd_check_path(char *str) {
/*
* If it starts with a slash, check the last component.
*/
if (str && str[0] == '/') {
char *tmp = strrchr(str, '/');
/*
* If it ends in "/old", check the second-to-last
* component of the string instead.
*/
if (tmp != str && strcmp(tmp, "/old") == 0) {
for (tmp--; *tmp != '/'; tmp--)
;
}
str = tmp + 1;
}
return (CTD_CHECK(str));
}
/*
* Find a vdev that matches the search criteria specified. We use the
* the nvpair name to determine how we should look for the device.
* 'avail_spare' is set to TRUE if the provided guid refers to an AVAIL
* spare; but FALSE if its an INUSE spare.
*/
static nvlist_t *
vdev_to_nvlist_iter(nvlist_t *nv, nvlist_t *search, boolean_t *avail_spare,
boolean_t *l2cache, boolean_t *log)
{
uint_t c, children;
nvlist_t **child;
nvlist_t *ret;
uint64_t is_log;
char *srchkey;
nvpair_t *pair = nvlist_next_nvpair(search, NULL);
/* Nothing to look for */
if (search == NULL || pair == NULL)
return (NULL);
/* Obtain the key we will use to search */
srchkey = nvpair_name(pair);
switch (nvpair_type(pair)) {
case DATA_TYPE_UINT64:
if (strcmp(srchkey, ZPOOL_CONFIG_GUID) == 0) {
uint64_t srchval, theguid;
verify(nvpair_value_uint64(pair, &srchval) == 0);
verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID,
&theguid) == 0);
if (theguid == srchval)
return (nv);
}
break;
case DATA_TYPE_STRING: {
char *srchval, *val;
verify(nvpair_value_string(pair, &srchval) == 0);
if (nvlist_lookup_string(nv, srchkey, &val) != 0)
break;
/*
* Search for the requested value. Special cases:
*
* - ZPOOL_CONFIG_PATH for whole disk entries. These end in
* "s0" or "s0/old". The "s0" part is hidden from the user,
* but included in the string, so this matches around it.
* - looking for a top-level vdev name (i.e. ZPOOL_CONFIG_TYPE).
*
* Otherwise, all other searches are simple string compares.
*/
if (strcmp(srchkey, ZPOOL_CONFIG_PATH) == 0 &&
ctd_check_path(val)) {
uint64_t wholedisk = 0;
(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
&wholedisk);
if (wholedisk) {
int slen = strlen(srchval);
int vlen = strlen(val);
if (slen != vlen - 2)
break;
/*
* make_leaf_vdev() should only set
* wholedisk for ZPOOL_CONFIG_PATHs which
* will include "/dev/dsk/", giving plenty of
* room for the indices used next.
*/
ASSERT(vlen >= 6);
/*
* strings identical except trailing "s0"
*/
if (strcmp(&val[vlen - 2], "s0") == 0 &&
strncmp(srchval, val, slen) == 0)
return (nv);
/*
* strings identical except trailing "s0/old"
*/
if (strcmp(&val[vlen - 6], "s0/old") == 0 &&
strcmp(&srchval[slen - 4], "/old") == 0 &&
strncmp(srchval, val, slen - 4) == 0)
return (nv);
break;
}
} else if (strcmp(srchkey, ZPOOL_CONFIG_TYPE) == 0 && val) {
char *type, *idx, *end, *p;
uint64_t id, vdev_id;
/*
* Determine our vdev type, keeping in mind
* that the srchval is composed of a type and
* vdev id pair (i.e. mirror-4).
*/
if ((type = strdup(srchval)) == NULL)
return (NULL);
if ((p = strrchr(type, '-')) == NULL) {
free(type);
break;
}
idx = p + 1;
*p = '\0';
/*
* If the types don't match then keep looking.
*/
if (strncmp(val, type, strlen(val)) != 0) {
free(type);
break;
}
verify(strncmp(type, VDEV_TYPE_RAIDZ,
strlen(VDEV_TYPE_RAIDZ)) == 0 ||
strncmp(type, VDEV_TYPE_MIRROR,
strlen(VDEV_TYPE_MIRROR)) == 0);
verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID,
&id) == 0);
errno = 0;
vdev_id = strtoull(idx, &end, 10);
free(type);
if (errno != 0)
return (NULL);
/*
* Now verify that we have the correct vdev id.
*/
if (vdev_id == id)
return (nv);
}
/*
* Common case
*/
if (strcmp(srchval, val) == 0)
return (nv);
break;
}
default:
break;
}
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
&child, &children) != 0)
return (NULL);
for (c = 0; c < children; c++) {
if ((ret = vdev_to_nvlist_iter(child[c], search,
avail_spare, l2cache, NULL)) != NULL) {
/*
* The 'is_log' value is only set for the toplevel
* vdev, not the leaf vdevs. So we always lookup the
* log device from the root of the vdev tree (where
* 'log' is non-NULL).
*/
if (log != NULL &&
nvlist_lookup_uint64(child[c],
ZPOOL_CONFIG_IS_LOG, &is_log) == 0 &&
is_log) {
*log = B_TRUE;
}
return (ret);
}
}
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES,
&child, &children) == 0) {
for (c = 0; c < children; c++) {
if ((ret = vdev_to_nvlist_iter(child[c], search,
avail_spare, l2cache, NULL)) != NULL) {
*avail_spare = B_TRUE;
return (ret);
}
}
}
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
&child, &children) == 0) {
for (c = 0; c < children; c++) {
if ((ret = vdev_to_nvlist_iter(child[c], search,
avail_spare, l2cache, NULL)) != NULL) {
*l2cache = B_TRUE;
return (ret);
}
}
}
return (NULL);
}
/*
* Given a physical path (minus the "/devices" prefix), find the
* associated vdev.
*/
nvlist_t *
zpool_find_vdev_by_physpath(zpool_handle_t *zhp, const char *ppath,
boolean_t *avail_spare, boolean_t *l2cache, boolean_t *log)
{
nvlist_t *search, *nvroot, *ret;
verify(nvlist_alloc(&search, NV_UNIQUE_NAME, KM_SLEEP) == 0);
verify(nvlist_add_string(search, ZPOOL_CONFIG_PHYS_PATH, ppath) == 0);
verify(nvlist_lookup_nvlist(zhp->zpool_config, ZPOOL_CONFIG_VDEV_TREE,
&nvroot) == 0);
*avail_spare = B_FALSE;
*l2cache = B_FALSE;
if (log != NULL)
*log = B_FALSE;
ret = vdev_to_nvlist_iter(nvroot, search, avail_spare, l2cache, log);
nvlist_free(search);
return (ret);
}
/*
* Determine if we have an "interior" top-level vdev (i.e mirror/raidz).
*/
boolean_t
zpool_vdev_is_interior(const char *name)
{
if (strncmp(name, VDEV_TYPE_RAIDZ, strlen(VDEV_TYPE_RAIDZ)) == 0 ||
strncmp(name, VDEV_TYPE_MIRROR, strlen(VDEV_TYPE_MIRROR)) == 0)
return (B_TRUE);
return (B_FALSE);
}
nvlist_t *
zpool_find_vdev(zpool_handle_t *zhp, const char *path, boolean_t *avail_spare,
boolean_t *l2cache, boolean_t *log)
{
char buf[MAXPATHLEN];
char *end;
nvlist_t *nvroot, *search, *ret;
uint64_t guid;
verify(nvlist_alloc(&search, NV_UNIQUE_NAME, KM_SLEEP) == 0);
guid = strtoull(path, &end, 10);
if (guid != 0 && *end == '\0') {
verify(nvlist_add_uint64(search, ZPOOL_CONFIG_GUID, guid) == 0);
} else if (zpool_vdev_is_interior(path)) {
verify(nvlist_add_string(search, ZPOOL_CONFIG_TYPE, path) == 0);
} else if (path[0] != '/') {
(void) snprintf(buf, sizeof (buf), "%s%s", "/dev/dsk/", path);
verify(nvlist_add_string(search, ZPOOL_CONFIG_PATH, buf) == 0);
} else {
verify(nvlist_add_string(search, ZPOOL_CONFIG_PATH, path) == 0);
}
verify(nvlist_lookup_nvlist(zhp->zpool_config, ZPOOL_CONFIG_VDEV_TREE,
&nvroot) == 0);
*avail_spare = B_FALSE;
*l2cache = B_FALSE;
if (log != NULL)
*log = B_FALSE;
ret = vdev_to_nvlist_iter(nvroot, search, avail_spare, l2cache, log);
nvlist_free(search);
return (ret);
}
static int
vdev_online(nvlist_t *nv)
{
uint64_t ival;
if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, &ival) == 0 ||
nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, &ival) == 0 ||
nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, &ival) == 0)
return (0);
return (1);
}
/*
* Helper function for zpool_get_physpaths().
*/
static int
vdev_get_one_physpath(nvlist_t *config, char *physpath, size_t physpath_size,
size_t *bytes_written)
{
size_t bytes_left, pos, rsz;
char *tmppath;
const char *format;
if (nvlist_lookup_string(config, ZPOOL_CONFIG_PHYS_PATH,
&tmppath) != 0)
return (EZFS_NODEVICE);
pos = *bytes_written;
bytes_left = physpath_size - pos;
format = (pos == 0) ? "%s" : " %s";
rsz = snprintf(physpath + pos, bytes_left, format, tmppath);
*bytes_written += rsz;
if (rsz >= bytes_left) {
/* if physpath was not copied properly, clear it */
if (bytes_left != 0) {
physpath[pos] = 0;
}
return (EZFS_NOSPC);
}
return (0);
}
static int
vdev_get_physpaths(nvlist_t *nv, char *physpath, size_t phypath_size,
size_t *rsz, boolean_t is_spare)
{
char *type;
int ret;
if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0)
return (EZFS_INVALCONFIG);
if (strcmp(type, VDEV_TYPE_DISK) == 0) {
/*
* An active spare device has ZPOOL_CONFIG_IS_SPARE set.
* For a spare vdev, we only want to boot from the active
* spare device.
*/
if (is_spare) {
uint64_t spare = 0;
(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE,
&spare);
if (!spare)
return (EZFS_INVALCONFIG);
}
if (vdev_online(nv)) {
if ((ret = vdev_get_one_physpath(nv, physpath,
phypath_size, rsz)) != 0)
return (ret);
}
} else if (strcmp(type, VDEV_TYPE_MIRROR) == 0 ||
strcmp(type, VDEV_TYPE_REPLACING) == 0 ||
(is_spare = (strcmp(type, VDEV_TYPE_SPARE) == 0))) {
nvlist_t **child;
uint_t count;
int i, ret;
if (nvlist_lookup_nvlist_array(nv,
ZPOOL_CONFIG_CHILDREN, &child, &count) != 0)
return (EZFS_INVALCONFIG);
for (i = 0; i < count; i++) {
ret = vdev_get_physpaths(child[i], physpath,
phypath_size, rsz, is_spare);
if (ret == EZFS_NOSPC)
return (ret);
}
}
return (EZFS_POOL_INVALARG);
}
/*
* Get phys_path for a root pool config.
* Return 0 on success; non-zero on failure.
*/
static int
zpool_get_config_physpath(nvlist_t *config, char *physpath, size_t phypath_size)
{
size_t rsz;
nvlist_t *vdev_root;
nvlist_t **child;
uint_t count;
char *type;
rsz = 0;
if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
&vdev_root) != 0)
return (EZFS_INVALCONFIG);
if (nvlist_lookup_string(vdev_root, ZPOOL_CONFIG_TYPE, &type) != 0 ||
nvlist_lookup_nvlist_array(vdev_root, ZPOOL_CONFIG_CHILDREN,
&child, &count) != 0)
return (EZFS_INVALCONFIG);
/*
* root pool can not have EFI labeled disks and can only have
* a single top-level vdev.
*/
if (strcmp(type, VDEV_TYPE_ROOT) != 0 || count != 1 ||
pool_uses_efi(vdev_root))
return (EZFS_POOL_INVALARG);
(void) vdev_get_physpaths(child[0], physpath, phypath_size, &rsz,
B_FALSE);
/* No online devices */
if (rsz == 0)
return (EZFS_NODEVICE);
return (0);
}
/*
* Get phys_path for a root pool
* Return 0 on success; non-zero on failure.
*/
int
zpool_get_physpath(zpool_handle_t *zhp, char *physpath, size_t phypath_size)
{
return (zpool_get_config_physpath(zhp->zpool_config, physpath,
phypath_size));
}
/*
* If the device has being dynamically expanded then we need to relabel
* the disk to use the new unallocated space.
*/
static int
zpool_relabel_disk(libzfs_handle_t *hdl, const char *name)
{
char path[MAXPATHLEN];
char errbuf[1024];
int fd, error;
int (*_efi_use_whole_disk)(int);
if ((_efi_use_whole_disk = (int (*)(int))dlsym(RTLD_DEFAULT,
"efi_use_whole_disk")) == NULL)
return (-1);
(void) snprintf(path, sizeof (path), "%s/%s", RDISK_ROOT, name);
if ((fd = open(path, O_RDWR | O_NDELAY)) < 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "cannot "
"relabel '%s': unable to open device"), name);
return (zfs_error(hdl, EZFS_OPENFAILED, errbuf));
}
/*
* It's possible that we might encounter an error if the device
* does not have any unallocated space left. If so, we simply
* ignore that error and continue on.
*/
error = _efi_use_whole_disk(fd);
(void) close(fd);
if (error && error != VT_ENOSPC) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "cannot "
"relabel '%s': unable to read disk capacity"), name);
return (zfs_error(hdl, EZFS_NOCAP, errbuf));
}
return (0);
}
/*
* Bring the specified vdev online. The 'flags' parameter is a set of the
* ZFS_ONLINE_* flags.
*/
int
zpool_vdev_online(zpool_handle_t *zhp, const char *path, int flags,
vdev_state_t *newstate)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
nvlist_t *tgt;
boolean_t avail_spare, l2cache, islog;
libzfs_handle_t *hdl = zhp->zpool_hdl;
if (flags & ZFS_ONLINE_EXPAND) {
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot expand %s"), path);
} else {
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot online %s"), path);
}
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache,
&islog)) == NULL)
return (zfs_error(hdl, EZFS_NODEVICE, msg));
verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0);
if (avail_spare)
return (zfs_error(hdl, EZFS_ISSPARE, msg));
if (flags & ZFS_ONLINE_EXPAND ||
zpool_get_prop_int(zhp, ZPOOL_PROP_AUTOEXPAND, NULL)) {
char *pathname = NULL;
uint64_t wholedisk = 0;
(void) nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_WHOLE_DISK,
&wholedisk);
verify(nvlist_lookup_string(tgt, ZPOOL_CONFIG_PATH,
&pathname) == 0);
/*
* XXX - L2ARC 1.0 devices can't support expansion.
*/
if (l2cache) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"cannot expand cache devices"));
return (zfs_error(hdl, EZFS_VDEVNOTSUP, msg));
}
if (wholedisk) {
pathname += strlen(DISK_ROOT) + 1;
(void) zpool_relabel_disk(hdl, pathname);
}
}
zc.zc_cookie = VDEV_STATE_ONLINE;
zc.zc_obj = flags;
if (zfs_ioctl(hdl, ZFS_IOC_VDEV_SET_STATE, &zc) != 0) {
if (errno == EINVAL) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "was split "
"from this pool into a new one. Use '%s' "
"instead"), "zpool detach");
return (zfs_error(hdl, EZFS_POSTSPLIT_ONLINE, msg));
}
return (zpool_standard_error(hdl, errno, msg));
}
*newstate = zc.zc_cookie;
return (0);
}
/*
* Take the specified vdev offline
*/
int
zpool_vdev_offline(zpool_handle_t *zhp, const char *path, boolean_t istmp)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
nvlist_t *tgt;
boolean_t avail_spare, l2cache;
libzfs_handle_t *hdl = zhp->zpool_hdl;
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot offline %s"), path);
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache,
NULL)) == NULL)
return (zfs_error(hdl, EZFS_NODEVICE, msg));
verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0);
if (avail_spare)
return (zfs_error(hdl, EZFS_ISSPARE, msg));
zc.zc_cookie = VDEV_STATE_OFFLINE;
zc.zc_obj = istmp ? ZFS_OFFLINE_TEMPORARY : 0;
if (zfs_ioctl(hdl, ZFS_IOC_VDEV_SET_STATE, &zc) == 0)
return (0);
switch (errno) {
case EBUSY:
/*
* There are no other replicas of this device.
*/
return (zfs_error(hdl, EZFS_NOREPLICAS, msg));
case EEXIST:
/*
* The log device has unplayed logs
*/
return (zfs_error(hdl, EZFS_UNPLAYED_LOGS, msg));
default:
return (zpool_standard_error(hdl, errno, msg));
}
}
/*
* Mark the given vdev faulted.
*/
int
zpool_vdev_fault(zpool_handle_t *zhp, uint64_t guid, vdev_aux_t aux)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
libzfs_handle_t *hdl = zhp->zpool_hdl;
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot fault %llu"), (u_longlong_t)guid);
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
zc.zc_guid = guid;
zc.zc_cookie = VDEV_STATE_FAULTED;
zc.zc_obj = aux;
if (ioctl(hdl->libzfs_fd, ZFS_IOC_VDEV_SET_STATE, &zc) == 0)
return (0);
switch (errno) {
case EBUSY:
/*
* There are no other replicas of this device.
*/
return (zfs_error(hdl, EZFS_NOREPLICAS, msg));
default:
return (zpool_standard_error(hdl, errno, msg));
}
}
/*
* Mark the given vdev degraded.
*/
int
zpool_vdev_degrade(zpool_handle_t *zhp, uint64_t guid, vdev_aux_t aux)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
libzfs_handle_t *hdl = zhp->zpool_hdl;
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot degrade %llu"), (u_longlong_t)guid);
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
zc.zc_guid = guid;
zc.zc_cookie = VDEV_STATE_DEGRADED;
zc.zc_obj = aux;
if (ioctl(hdl->libzfs_fd, ZFS_IOC_VDEV_SET_STATE, &zc) == 0)
return (0);
return (zpool_standard_error(hdl, errno, msg));
}
/*
* Returns TRUE if the given nvlist is a vdev that was originally swapped in as
* a hot spare.
*/
static boolean_t
is_replacing_spare(nvlist_t *search, nvlist_t *tgt, int which)
{
nvlist_t **child;
uint_t c, children;
char *type;
if (nvlist_lookup_nvlist_array(search, ZPOOL_CONFIG_CHILDREN, &child,
&children) == 0) {
verify(nvlist_lookup_string(search, ZPOOL_CONFIG_TYPE,
&type) == 0);
if (strcmp(type, VDEV_TYPE_SPARE) == 0 &&
children == 2 && child[which] == tgt)
return (B_TRUE);
for (c = 0; c < children; c++)
if (is_replacing_spare(child[c], tgt, which))
return (B_TRUE);
}
return (B_FALSE);
}
/*
* Attach new_disk (fully described by nvroot) to old_disk.
* If 'replacing' is specified, the new disk will replace the old one.
*/
int
zpool_vdev_attach(zpool_handle_t *zhp,
const char *old_disk, const char *new_disk, nvlist_t *nvroot, int replacing)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
int ret;
nvlist_t *tgt;
boolean_t avail_spare, l2cache, islog;
uint64_t val;
char *newname;
nvlist_t **child;
uint_t children;
nvlist_t *config_root;
libzfs_handle_t *hdl = zhp->zpool_hdl;
boolean_t rootpool = pool_is_bootable(zhp);
if (replacing)
(void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
"cannot replace %s with %s"), old_disk, new_disk);
else
(void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
"cannot attach %s to %s"), new_disk, old_disk);
/*
* If this is a root pool, make sure that we're not attaching an
* EFI labeled device.
*/
if (rootpool && pool_uses_efi(nvroot)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"EFI labeled devices are not supported on root pools."));
return (zfs_error(hdl, EZFS_POOL_NOTSUP, msg));
}
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
if ((tgt = zpool_find_vdev(zhp, old_disk, &avail_spare, &l2cache,
&islog)) == 0)
return (zfs_error(hdl, EZFS_NODEVICE, msg));
if (avail_spare)
return (zfs_error(hdl, EZFS_ISSPARE, msg));
if (l2cache)
return (zfs_error(hdl, EZFS_ISL2CACHE, msg));
verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0);
zc.zc_cookie = replacing;
if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
&child, &children) != 0 || children != 1) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"new device must be a single disk"));
return (zfs_error(hdl, EZFS_INVALCONFIG, msg));
}
verify(nvlist_lookup_nvlist(zpool_get_config(zhp, NULL),
ZPOOL_CONFIG_VDEV_TREE, &config_root) == 0);
if ((newname = zpool_vdev_name(NULL, NULL, child[0], B_FALSE)) == NULL)
return (-1);
/*
* If the target is a hot spare that has been swapped in, we can only
* replace it with another hot spare.
*/
if (replacing &&
nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_IS_SPARE, &val) == 0 &&
(zpool_find_vdev(zhp, newname, &avail_spare, &l2cache,
NULL) == NULL || !avail_spare) &&
is_replacing_spare(config_root, tgt, 1)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"can only be replaced by another hot spare"));
free(newname);
return (zfs_error(hdl, EZFS_BADTARGET, msg));
}
free(newname);
if (zcmd_write_conf_nvlist(hdl, &zc, nvroot) != 0)
return (-1);
ret = zfs_ioctl(hdl, ZFS_IOC_VDEV_ATTACH, &zc);
zcmd_free_nvlists(&zc);
if (ret == 0) {
if (rootpool) {
/*
* XXX need a better way to prevent user from
* booting up a half-baked vdev.
*/
(void) fprintf(stderr, dgettext(TEXT_DOMAIN, "Make "
"sure to wait until resilver is done "
"before rebooting.\n"));
}
return (0);
}
switch (errno) {
case ENOTSUP:
/*
* Can't attach to or replace this type of vdev.
*/
if (replacing) {
uint64_t version = zpool_get_prop_int(zhp,
ZPOOL_PROP_VERSION, NULL);
if (islog)
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"cannot replace a log with a spare"));
else if (version >= SPA_VERSION_MULTI_REPLACE)
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"already in replacing/spare config; wait "
"for completion or use 'zpool detach'"));
else
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"cannot replace a replacing device"));
} else {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"can only attach to mirrors and top-level "
"disks"));
}
(void) zfs_error(hdl, EZFS_BADTARGET, msg);
break;
case EINVAL:
/*
* The new device must be a single disk.
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"new device must be a single disk"));
(void) zfs_error(hdl, EZFS_INVALCONFIG, msg);
break;
case EBUSY:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "%s is busy"),
new_disk);
(void) zfs_error(hdl, EZFS_BADDEV, msg);
break;
case EOVERFLOW:
/*
* The new device is too small.
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"device is too small"));
(void) zfs_error(hdl, EZFS_BADDEV, msg);
break;
case EDOM:
/*
* The new device has a different alignment requirement.
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"devices have different sector alignment"));
(void) zfs_error(hdl, EZFS_BADDEV, msg);
break;
case ENAMETOOLONG:
/*
* The resulting top-level vdev spec won't fit in the label.
*/
(void) zfs_error(hdl, EZFS_DEVOVERFLOW, msg);
break;
default:
(void) zpool_standard_error(hdl, errno, msg);
}
return (-1);
}
/*
* Detach the specified device.
*/
int
zpool_vdev_detach(zpool_handle_t *zhp, const char *path)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
nvlist_t *tgt;
boolean_t avail_spare, l2cache;
libzfs_handle_t *hdl = zhp->zpool_hdl;
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot detach %s"), path);
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache,
NULL)) == 0)
return (zfs_error(hdl, EZFS_NODEVICE, msg));
if (avail_spare)
return (zfs_error(hdl, EZFS_ISSPARE, msg));
if (l2cache)
return (zfs_error(hdl, EZFS_ISL2CACHE, msg));
verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0);
if (zfs_ioctl(hdl, ZFS_IOC_VDEV_DETACH, &zc) == 0)
return (0);
switch (errno) {
case ENOTSUP:
/*
* Can't detach from this type of vdev.
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "only "
"applicable to mirror and replacing vdevs"));
(void) zfs_error(hdl, EZFS_BADTARGET, msg);
break;
case EBUSY:
/*
* There are no other replicas of this device.
*/
(void) zfs_error(hdl, EZFS_NOREPLICAS, msg);
break;
default:
(void) zpool_standard_error(hdl, errno, msg);
}
return (-1);
}
/*
* Find a mirror vdev in the source nvlist.
*
* The mchild array contains a list of disks in one of the top-level mirrors
* of the source pool. The schild array contains a list of disks that the
* user specified on the command line. We loop over the mchild array to
* see if any entry in the schild array matches.
*
* If a disk in the mchild array is found in the schild array, we return
* the index of that entry. Otherwise we return -1.
*/
static int
find_vdev_entry(zpool_handle_t *zhp, nvlist_t **mchild, uint_t mchildren,
nvlist_t **schild, uint_t schildren)
{
uint_t mc;
for (mc = 0; mc < mchildren; mc++) {
uint_t sc;
char *mpath = zpool_vdev_name(zhp->zpool_hdl, zhp,
mchild[mc], B_FALSE);
for (sc = 0; sc < schildren; sc++) {
char *spath = zpool_vdev_name(zhp->zpool_hdl, zhp,
schild[sc], B_FALSE);
boolean_t result = (strcmp(mpath, spath) == 0);
free(spath);
if (result) {
free(mpath);
return (mc);
}
}
free(mpath);
}
return (-1);
}
/*
* Split a mirror pool. If newroot points to null, then a new nvlist
* is generated and it is the responsibility of the caller to free it.
*/
int
zpool_vdev_split(zpool_handle_t *zhp, char *newname, nvlist_t **newroot,
nvlist_t *props, splitflags_t flags)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
nvlist_t *tree, *config, **child, **newchild, *newconfig = NULL;
nvlist_t **varray = NULL, *zc_props = NULL;
uint_t c, children, newchildren, lastlog = 0, vcount, found = 0;
libzfs_handle_t *hdl = zhp->zpool_hdl;
uint64_t vers;
boolean_t freelist = B_FALSE, memory_err = B_TRUE;
int retval = 0;
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "Unable to split %s"), zhp->zpool_name);
if (!zpool_name_valid(hdl, B_FALSE, newname))
return (zfs_error(hdl, EZFS_INVALIDNAME, msg));
if ((config = zpool_get_config(zhp, NULL)) == NULL) {
(void) fprintf(stderr, gettext("Internal error: unable to "
"retrieve pool configuration\n"));
return (-1);
}
verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &tree)
== 0);
verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, &vers) == 0);
if (props) {
prop_flags_t flags = { .create = B_FALSE, .import = B_TRUE };
if ((zc_props = zpool_valid_proplist(hdl, zhp->zpool_name,
props, vers, flags, msg)) == NULL)
return (-1);
}
if (nvlist_lookup_nvlist_array(tree, ZPOOL_CONFIG_CHILDREN, &child,
&children) != 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"Source pool is missing vdev tree"));
if (zc_props)
nvlist_free(zc_props);
return (-1);
}
varray = zfs_alloc(hdl, children * sizeof (nvlist_t *));
vcount = 0;
if (*newroot == NULL ||
nvlist_lookup_nvlist_array(*newroot, ZPOOL_CONFIG_CHILDREN,
&newchild, &newchildren) != 0)
newchildren = 0;
for (c = 0; c < children; c++) {
uint64_t is_log = B_FALSE, is_hole = B_FALSE;
char *type;
nvlist_t **mchild, *vdev;
uint_t mchildren;
int entry;
/*
* Unlike cache & spares, slogs are stored in the
* ZPOOL_CONFIG_CHILDREN array. We filter them out here.
*/
(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
&is_log);
(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE,
&is_hole);
if (is_log || is_hole) {
/*
* Create a hole vdev and put it in the config.
*/
if (nvlist_alloc(&vdev, NV_UNIQUE_NAME, 0) != 0)
goto out;
if (nvlist_add_string(vdev, ZPOOL_CONFIG_TYPE,
VDEV_TYPE_HOLE) != 0)
goto out;
if (nvlist_add_uint64(vdev, ZPOOL_CONFIG_IS_HOLE,
1) != 0)
goto out;
if (lastlog == 0)
lastlog = vcount;
varray[vcount++] = vdev;
continue;
}
lastlog = 0;
verify(nvlist_lookup_string(child[c], ZPOOL_CONFIG_TYPE, &type)
== 0);
if (strcmp(type, VDEV_TYPE_MIRROR) != 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"Source pool must be composed only of mirrors\n"));
retval = zfs_error(hdl, EZFS_INVALCONFIG, msg);
goto out;
}
verify(nvlist_lookup_nvlist_array(child[c],
ZPOOL_CONFIG_CHILDREN, &mchild, &mchildren) == 0);
/* find or add an entry for this top-level vdev */
if (newchildren > 0 &&
(entry = find_vdev_entry(zhp, mchild, mchildren,
newchild, newchildren)) >= 0) {
/* We found a disk that the user specified. */
vdev = mchild[entry];
++found;
} else {
/* User didn't specify a disk for this vdev. */
vdev = mchild[mchildren - 1];
}
if (nvlist_dup(vdev, &varray[vcount++], 0) != 0)
goto out;
}
/* did we find every disk the user specified? */
if (found != newchildren) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "Device list must "
"include at most one disk from each mirror"));
retval = zfs_error(hdl, EZFS_INVALCONFIG, msg);
goto out;
}
/* Prepare the nvlist for populating. */
if (*newroot == NULL) {
if (nvlist_alloc(newroot, NV_UNIQUE_NAME, 0) != 0)
goto out;
freelist = B_TRUE;
if (nvlist_add_string(*newroot, ZPOOL_CONFIG_TYPE,
VDEV_TYPE_ROOT) != 0)
goto out;
} else {
verify(nvlist_remove_all(*newroot, ZPOOL_CONFIG_CHILDREN) == 0);
}
/* Add all the children we found */
if (nvlist_add_nvlist_array(*newroot, ZPOOL_CONFIG_CHILDREN, varray,
lastlog == 0 ? vcount : lastlog) != 0)
goto out;
/*
* If we're just doing a dry run, exit now with success.
*/
if (flags.dryrun) {
memory_err = B_FALSE;
freelist = B_FALSE;
goto out;
}
/* now build up the config list & call the ioctl */
if (nvlist_alloc(&newconfig, NV_UNIQUE_NAME, 0) != 0)
goto out;
if (nvlist_add_nvlist(newconfig,
ZPOOL_CONFIG_VDEV_TREE, *newroot) != 0 ||
nvlist_add_string(newconfig,
ZPOOL_CONFIG_POOL_NAME, newname) != 0 ||
nvlist_add_uint64(newconfig, ZPOOL_CONFIG_VERSION, vers) != 0)
goto out;
/*
* The new pool is automatically part of the namespace unless we
* explicitly export it.
*/
if (!flags.import)
zc.zc_cookie = ZPOOL_EXPORT_AFTER_SPLIT;
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
(void) strlcpy(zc.zc_string, newname, sizeof (zc.zc_string));
if (zcmd_write_conf_nvlist(hdl, &zc, newconfig) != 0)
goto out;
if (zc_props != NULL && zcmd_write_src_nvlist(hdl, &zc, zc_props) != 0)
goto out;
if (zfs_ioctl(hdl, ZFS_IOC_VDEV_SPLIT, &zc) != 0) {
retval = zpool_standard_error(hdl, errno, msg);
goto out;
}
freelist = B_FALSE;
memory_err = B_FALSE;
out:
if (varray != NULL) {
int v;
for (v = 0; v < vcount; v++)
nvlist_free(varray[v]);
free(varray);
}
zcmd_free_nvlists(&zc);
if (zc_props)
nvlist_free(zc_props);
if (newconfig)
nvlist_free(newconfig);
if (freelist) {
nvlist_free(*newroot);
*newroot = NULL;
}
if (retval != 0)
return (retval);
if (memory_err)
return (no_memory(hdl));
return (0);
}
/*
* Remove the given device. Currently, this is supported only for hot spares
* and level 2 cache devices.
*/
int
zpool_vdev_remove(zpool_handle_t *zhp, const char *path)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
nvlist_t *tgt;
boolean_t avail_spare, l2cache, islog;
libzfs_handle_t *hdl = zhp->zpool_hdl;
uint64_t version;
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot remove %s"), path);
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache,
&islog)) == 0)
return (zfs_error(hdl, EZFS_NODEVICE, msg));
/*
* XXX - this should just go away.
*/
if (!avail_spare && !l2cache && !islog) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"only inactive hot spares, cache, top-level, "
"or log devices can be removed"));
return (zfs_error(hdl, EZFS_NODEVICE, msg));
}
version = zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL);
if (islog && version < SPA_VERSION_HOLES) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"pool must be upgrade to support log removal"));
return (zfs_error(hdl, EZFS_BADVERSION, msg));
}
verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0);
if (zfs_ioctl(hdl, ZFS_IOC_VDEV_REMOVE, &zc) == 0)
return (0);
return (zpool_standard_error(hdl, errno, msg));
}
/*
* Clear the errors for the pool, or the particular device if specified.
*/
int
zpool_clear(zpool_handle_t *zhp, const char *path, nvlist_t *rewindnvl)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
nvlist_t *tgt;
zpool_rewind_policy_t policy;
boolean_t avail_spare, l2cache;
libzfs_handle_t *hdl = zhp->zpool_hdl;
nvlist_t *nvi = NULL;
int error;
if (path)
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot clear errors for %s"),
path);
else
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot clear errors for %s"),
zhp->zpool_name);
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
if (path) {
if ((tgt = zpool_find_vdev(zhp, path, &avail_spare,
&l2cache, NULL)) == 0)
return (zfs_error(hdl, EZFS_NODEVICE, msg));
/*
* Don't allow error clearing for hot spares. Do allow
* error clearing for l2cache devices.
*/
if (avail_spare)
return (zfs_error(hdl, EZFS_ISSPARE, msg));
verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID,
&zc.zc_guid) == 0);
}
zpool_get_rewind_policy(rewindnvl, &policy);
zc.zc_cookie = policy.zrp_request;
if (zcmd_alloc_dst_nvlist(hdl, &zc, zhp->zpool_config_size * 2) != 0)
return (-1);
if (zcmd_write_src_nvlist(hdl, &zc, rewindnvl) != 0)
return (-1);
while ((error = zfs_ioctl(hdl, ZFS_IOC_CLEAR, &zc)) != 0 &&
errno == ENOMEM) {
if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
zcmd_free_nvlists(&zc);
return (-1);
}
}
if (!error || ((policy.zrp_request & ZPOOL_TRY_REWIND) &&
errno != EPERM && errno != EACCES)) {
if (policy.zrp_request &
(ZPOOL_DO_REWIND | ZPOOL_TRY_REWIND)) {
(void) zcmd_read_dst_nvlist(hdl, &zc, &nvi);
zpool_rewind_exclaim(hdl, zc.zc_name,
((policy.zrp_request & ZPOOL_TRY_REWIND) != 0),
nvi);
nvlist_free(nvi);
}
zcmd_free_nvlists(&zc);
return (0);
}
zcmd_free_nvlists(&zc);
return (zpool_standard_error(hdl, errno, msg));
}
/*
* Similar to zpool_clear(), but takes a GUID (used by fmd).
*/
int
zpool_vdev_clear(zpool_handle_t *zhp, uint64_t guid)
{
zfs_cmd_t zc = { 0 };
char msg[1024];
libzfs_handle_t *hdl = zhp->zpool_hdl;
(void) snprintf(msg, sizeof (msg),
dgettext(TEXT_DOMAIN, "cannot clear errors for %llx"),
(u_longlong_t)guid);
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
zc.zc_guid = guid;
zc.zc_cookie = ZPOOL_NO_REWIND;
if (ioctl(hdl->libzfs_fd, ZFS_IOC_CLEAR, &zc) == 0)
return (0);
return (zpool_standard_error(hdl, errno, msg));
}
/*
* Convert from a devid string to a path.
*/
static char *
devid_to_path(char *devid_str)
{
ddi_devid_t devid;
char *minor;
char *path;
devid_nmlist_t *list = NULL;
int ret;
if (devid_str_decode(devid_str, &devid, &minor) != 0)
return (NULL);
ret = devid_deviceid_to_nmlist("/dev", devid, minor, &list);
devid_str_free(minor);
devid_free(devid);
if (ret != 0)
return (NULL);
if ((path = strdup(list[0].devname)) == NULL)
return (NULL);
devid_free_nmlist(list);
return (path);
}
/*
* Convert from a path to a devid string.
*/
static char *
path_to_devid(const char *path)
{
int fd;
ddi_devid_t devid;
char *minor, *ret;
if ((fd = open(path, O_RDONLY)) < 0)
return (NULL);
minor = NULL;
ret = NULL;
if (devid_get(fd, &devid) == 0) {
if (devid_get_minor_name(fd, &minor) == 0)
ret = devid_str_encode(devid, minor);
if (minor != NULL)
devid_str_free(minor);
devid_free(devid);
}
(void) close(fd);
return (ret);
}
/*
* Issue the necessary ioctl() to update the stored path value for the vdev. We
* ignore any failure here, since a common case is for an unprivileged user to
* type 'zpool status', and we'll display the correct information anyway.
*/
static void
set_path(zpool_handle_t *zhp, nvlist_t *nv, const char *path)
{
zfs_cmd_t zc = { 0 };
(void) strncpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
(void) strncpy(zc.zc_value, path, sizeof (zc.zc_value));
verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID,
&zc.zc_guid) == 0);
(void) ioctl(zhp->zpool_hdl->libzfs_fd, ZFS_IOC_VDEV_SETPATH, &zc);
}
/*
* Given a vdev, return the name to display in iostat. If the vdev has a path,
* we use that, stripping off any leading "/dev/dsk/"; if not, we use the type.
* We also check if this is a whole disk, in which case we strip off the
* trailing 's0' slice name.
*
* This routine is also responsible for identifying when disks have been
* reconfigured in a new location. The kernel will have opened the device by
* devid, but the path will still refer to the old location. To catch this, we
* first do a path -> devid translation (which is fast for the common case). If
* the devid matches, we're done. If not, we do a reverse devid -> path
* translation and issue the appropriate ioctl() to update the path of the vdev.
* If 'zhp' is NULL, then this is an exported pool, and we don't need to do any
* of these checks.
*/
char *
zpool_vdev_name(libzfs_handle_t *hdl, zpool_handle_t *zhp, nvlist_t *nv,
boolean_t verbose)
{
char *path, *devid;
uint64_t value;
char buf[64];
vdev_stat_t *vs;
uint_t vsc;
if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT,
&value) == 0) {
verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID,
&value) == 0);
(void) snprintf(buf, sizeof (buf), "%llu",
(u_longlong_t)value);
path = buf;
} else if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) == 0) {
/*
* If the device is dead (faulted, offline, etc) then don't
* bother opening it. Otherwise we may be forcing the user to
* open a misbehaving device, which can have undesirable
* effects.
*/
if ((nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS,
(uint64_t **)&vs, &vsc) != 0 ||
vs->vs_state >= VDEV_STATE_DEGRADED) &&
zhp != NULL &&
nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &devid) == 0) {
/*
* Determine if the current path is correct.
*/
char *newdevid = path_to_devid(path);
if (newdevid == NULL ||
strcmp(devid, newdevid) != 0) {
char *newpath;
if ((newpath = devid_to_path(devid)) != NULL) {
/*
* Update the path appropriately.
*/
set_path(zhp, nv, newpath);
if (nvlist_add_string(nv,
ZPOOL_CONFIG_PATH, newpath) == 0)
verify(nvlist_lookup_string(nv,
ZPOOL_CONFIG_PATH,
&path) == 0);
free(newpath);
}
}
if (newdevid)
devid_str_free(newdevid);
}
if (strncmp(path, "/dev/dsk/", 9) == 0)
path += 9;
if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
&value) == 0 && value) {
int pathlen = strlen(path);
char *tmp = zfs_strdup(hdl, path);
/*
* If it starts with c#, and ends with "s0", chop
* the "s0" off, or if it ends with "s0/old", remove
* the "s0" from the middle.
*/
if (CTD_CHECK(tmp)) {
if (strcmp(&tmp[pathlen - 2], "s0") == 0) {
tmp[pathlen - 2] = '\0';
} else if (pathlen > 6 &&
strcmp(&tmp[pathlen - 6], "s0/old") == 0) {
(void) strcpy(&tmp[pathlen - 6],
"/old");
}
}
return (tmp);
}
} else {
verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &path) == 0);
/*
* If it's a raidz device, we need to stick in the parity level.
*/
if (strcmp(path, VDEV_TYPE_RAIDZ) == 0) {
verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY,
&value) == 0);
(void) snprintf(buf, sizeof (buf), "%s%llu", path,
(u_longlong_t)value);
path = buf;
}
/*
* We identify each top-level vdev by using a <type-id>
* naming convention.
*/
if (verbose) {
uint64_t id;
verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID,
&id) == 0);
(void) snprintf(buf, sizeof (buf), "%s-%llu", path,
(u_longlong_t)id);
path = buf;
}
}
return (zfs_strdup(hdl, path));
}
static int
zbookmark_compare(const void *a, const void *b)
{
return (memcmp(a, b, sizeof (zbookmark_t)));
}
/*
* Retrieve the persistent error log, uniquify the members, and return to the
* caller.
*/
int
zpool_get_errlog(zpool_handle_t *zhp, nvlist_t **nverrlistp)
{
zfs_cmd_t zc = { 0 };
uint64_t count;
zbookmark_t *zb = NULL;
int i;
/*
* Retrieve the raw error list from the kernel. If the number of errors
* has increased, allocate more space and continue until we get the
* entire list.
*/
verify(nvlist_lookup_uint64(zhp->zpool_config, ZPOOL_CONFIG_ERRCOUNT,
&count) == 0);
if (count == 0)
return (0);
if ((zc.zc_nvlist_dst = (uintptr_t)zfs_alloc(zhp->zpool_hdl,
count * sizeof (zbookmark_t))) == (uintptr_t)NULL)
return (-1);
zc.zc_nvlist_dst_size = count;
(void) strcpy(zc.zc_name, zhp->zpool_name);
for (;;) {
if (ioctl(zhp->zpool_hdl->libzfs_fd, ZFS_IOC_ERROR_LOG,
&zc) != 0) {
free((void *)(uintptr_t)zc.zc_nvlist_dst);
if (errno == ENOMEM) {
count = zc.zc_nvlist_dst_size;
if ((zc.zc_nvlist_dst = (uintptr_t)
zfs_alloc(zhp->zpool_hdl, count *
sizeof (zbookmark_t))) == (uintptr_t)NULL)
return (-1);
} else {
return (-1);
}
} else {
break;
}
}
/*
* Sort the resulting bookmarks. This is a little confusing due to the
* implementation of ZFS_IOC_ERROR_LOG. The bookmarks are copied last
* to first, and 'zc_nvlist_dst_size' indicates the number of boomarks
* _not_ copied as part of the process. So we point the start of our
* array appropriate and decrement the total number of elements.
*/
zb = ((zbookmark_t *)(uintptr_t)zc.zc_nvlist_dst) +
zc.zc_nvlist_dst_size;
count -= zc.zc_nvlist_dst_size;
qsort(zb, count, sizeof (zbookmark_t), zbookmark_compare);
verify(nvlist_alloc(nverrlistp, 0, KM_SLEEP) == 0);
/*
* Fill in the nverrlistp with nvlist's of dataset and object numbers.
*/
for (i = 0; i < count; i++) {
nvlist_t *nv;
/* ignoring zb_blkid and zb_level for now */
if (i > 0 && zb[i-1].zb_objset == zb[i].zb_objset &&
zb[i-1].zb_object == zb[i].zb_object)
continue;
if (nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) != 0)
goto nomem;
if (nvlist_add_uint64(nv, ZPOOL_ERR_DATASET,
zb[i].zb_objset) != 0) {
nvlist_free(nv);
goto nomem;
}
if (nvlist_add_uint64(nv, ZPOOL_ERR_OBJECT,
zb[i].zb_object) != 0) {
nvlist_free(nv);
goto nomem;
}
if (nvlist_add_nvlist(*nverrlistp, "ejk", nv) != 0) {
nvlist_free(nv);
goto nomem;
}
nvlist_free(nv);
}
free((void *)(uintptr_t)zc.zc_nvlist_dst);
return (0);
nomem:
free((void *)(uintptr_t)zc.zc_nvlist_dst);
return (no_memory(zhp->zpool_hdl));
}
/*
* Upgrade a ZFS pool to the latest on-disk version.
*/
int
zpool_upgrade(zpool_handle_t *zhp, uint64_t new_version)
{
zfs_cmd_t zc = { 0 };
libzfs_handle_t *hdl = zhp->zpool_hdl;
(void) strcpy(zc.zc_name, zhp->zpool_name);
zc.zc_cookie = new_version;
if (zfs_ioctl(hdl, ZFS_IOC_POOL_UPGRADE, &zc) != 0)
return (zpool_standard_error_fmt(hdl, errno,
dgettext(TEXT_DOMAIN, "cannot upgrade '%s'"),
zhp->zpool_name));
return (0);
}
void
zpool_set_history_str(const char *subcommand, int argc, char **argv,
char *history_str)
{
int i;
(void) strlcpy(history_str, subcommand, HIS_MAX_RECORD_LEN);
for (i = 1; i < argc; i++) {
if (strlen(history_str) + 1 + strlen(argv[i]) >
HIS_MAX_RECORD_LEN)
break;
(void) strlcat(history_str, " ", HIS_MAX_RECORD_LEN);
(void) strlcat(history_str, argv[i], HIS_MAX_RECORD_LEN);
}
}
/*
* Stage command history for logging.
*/
int
zpool_stage_history(libzfs_handle_t *hdl, const char *history_str)
{
if (history_str == NULL)
return (EINVAL);
if (strlen(history_str) > HIS_MAX_RECORD_LEN)
return (EINVAL);
if (hdl->libzfs_log_str != NULL)
free(hdl->libzfs_log_str);
if ((hdl->libzfs_log_str = strdup(history_str)) == NULL)
return (no_memory(hdl));
return (0);
}
/*
* Perform ioctl to get some command history of a pool.
*
* 'buf' is the buffer to fill up to 'len' bytes. 'off' is the
* logical offset of the history buffer to start reading from.
*
* Upon return, 'off' is the next logical offset to read from and
* 'len' is the actual amount of bytes read into 'buf'.
*/
static int
get_history(zpool_handle_t *zhp, char *buf, uint64_t *off, uint64_t *len)
{
zfs_cmd_t zc = { 0 };
libzfs_handle_t *hdl = zhp->zpool_hdl;
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
zc.zc_history = (uint64_t)(uintptr_t)buf;
zc.zc_history_len = *len;
zc.zc_history_offset = *off;
if (ioctl(hdl->libzfs_fd, ZFS_IOC_POOL_GET_HISTORY, &zc) != 0) {
switch (errno) {
case EPERM:
return (zfs_error_fmt(hdl, EZFS_PERM,
dgettext(TEXT_DOMAIN,
"cannot show history for pool '%s'"),
zhp->zpool_name));
case ENOENT:
return (zfs_error_fmt(hdl, EZFS_NOHISTORY,
dgettext(TEXT_DOMAIN, "cannot get history for pool "
"'%s'"), zhp->zpool_name));
case ENOTSUP:
return (zfs_error_fmt(hdl, EZFS_BADVERSION,
dgettext(TEXT_DOMAIN, "cannot get history for pool "
"'%s', pool must be upgraded"), zhp->zpool_name));
default:
return (zpool_standard_error_fmt(hdl, errno,
dgettext(TEXT_DOMAIN,
"cannot get history for '%s'"), zhp->zpool_name));
}
}
*len = zc.zc_history_len;
*off = zc.zc_history_offset;
return (0);
}
/*
* Process the buffer of nvlists, unpacking and storing each nvlist record
* into 'records'. 'leftover' is set to the number of bytes that weren't
* processed as there wasn't a complete record.
*/
int
zpool_history_unpack(char *buf, uint64_t bytes_read, uint64_t *leftover,
nvlist_t ***records, uint_t *numrecords)
{
uint64_t reclen;
nvlist_t *nv;
int i;
while (bytes_read > sizeof (reclen)) {
/* get length of packed record (stored as little endian) */
for (i = 0, reclen = 0; i < sizeof (reclen); i++)
reclen += (uint64_t)(((uchar_t *)buf)[i]) << (8*i);
if (bytes_read < sizeof (reclen) + reclen)
break;
/* unpack record */
if (nvlist_unpack(buf + sizeof (reclen), reclen, &nv, 0) != 0)
return (ENOMEM);
bytes_read -= sizeof (reclen) + reclen;
buf += sizeof (reclen) + reclen;
/* add record to nvlist array */
(*numrecords)++;
if (ISP2(*numrecords + 1)) {
*records = realloc(*records,
*numrecords * 2 * sizeof (nvlist_t *));
}
(*records)[*numrecords - 1] = nv;
}
*leftover = bytes_read;
return (0);
}
#define HIS_BUF_LEN (128*1024)
/*
* Retrieve the command history of a pool.
*/
int
zpool_get_history(zpool_handle_t *zhp, nvlist_t **nvhisp)
{
char buf[HIS_BUF_LEN];
uint64_t off = 0;
nvlist_t **records = NULL;
uint_t numrecords = 0;
int err, i;
do {
uint64_t bytes_read = sizeof (buf);
uint64_t leftover;
if ((err = get_history(zhp, buf, &off, &bytes_read)) != 0)
break;
/* if nothing else was read in, we're at EOF, just return */
if (!bytes_read)
break;
if ((err = zpool_history_unpack(buf, bytes_read,
&leftover, &records, &numrecords)) != 0)
break;
off -= leftover;
/* CONSTCOND */
} while (1);
if (!err) {
verify(nvlist_alloc(nvhisp, NV_UNIQUE_NAME, 0) == 0);
verify(nvlist_add_nvlist_array(*nvhisp, ZPOOL_HIST_RECORD,
records, numrecords) == 0);
}
for (i = 0; i < numrecords; i++)
nvlist_free(records[i]);
free(records);
return (err);
}
void
zpool_obj_to_path(zpool_handle_t *zhp, uint64_t dsobj, uint64_t obj,
char *pathname, size_t len)
{
zfs_cmd_t zc = { 0 };
boolean_t mounted = B_FALSE;
char *mntpnt = NULL;
char dsname[MAXNAMELEN];
if (dsobj == 0) {
/* special case for the MOS */
(void) snprintf(pathname, len, "<metadata>:<0x%llx>", (longlong_t)obj);
return;
}
/* get the dataset's name */
(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
zc.zc_obj = dsobj;
if (ioctl(zhp->zpool_hdl->libzfs_fd,
ZFS_IOC_DSOBJ_TO_DSNAME, &zc) != 0) {
/* just write out a path of two object numbers */
(void) snprintf(pathname, len, "<0x%llx>:<0x%llx>",
(longlong_t)dsobj, (longlong_t)obj);
return;
}
(void) strlcpy(dsname, zc.zc_value, sizeof (dsname));
/* find out if the dataset is mounted */
mounted = is_mounted(zhp->zpool_hdl, dsname, &mntpnt);
/* get the corrupted object's path */
(void) strlcpy(zc.zc_name, dsname, sizeof (zc.zc_name));
zc.zc_obj = obj;
if (ioctl(zhp->zpool_hdl->libzfs_fd, ZFS_IOC_OBJ_TO_PATH,
&zc) == 0) {
if (mounted) {
(void) snprintf(pathname, len, "%s%s", mntpnt,
zc.zc_value);
} else {
(void) snprintf(pathname, len, "%s:%s",
dsname, zc.zc_value);
}
} else {
(void) snprintf(pathname, len, "%s:<0x%llx>", dsname, (longlong_t)obj);
}
free(mntpnt);
}
/*
* Read the EFI label from the config, if a label does not exist then
* pass back the error to the caller. If the caller has passed a non-NULL
* diskaddr argument then we set it to the starting address of the EFI
* partition.
*/
static int
read_efi_label(nvlist_t *config, diskaddr_t *sb)
{
char *path;
int fd;
char diskname[MAXPATHLEN];
int err = -1;
if (nvlist_lookup_string(config, ZPOOL_CONFIG_PATH, &path) != 0)
return (err);
(void) snprintf(diskname, sizeof (diskname), "%s%s", RDISK_ROOT,
strrchr(path, '/'));
if ((fd = open(diskname, O_RDONLY|O_NDELAY)) >= 0) {
struct dk_gpt *vtoc;
if ((err = efi_alloc_and_read(fd, &vtoc)) >= 0) {
if (sb != NULL)
*sb = vtoc->efi_parts[0].p_start;
efi_free(vtoc);
}
(void) close(fd);
}
return (err);
}
/*
* determine where a partition starts on a disk in the current
* configuration
*/
static diskaddr_t
find_start_block(nvlist_t *config)
{
nvlist_t **child;
uint_t c, children;
diskaddr_t sb = MAXOFFSET_T;
uint64_t wholedisk;
if (nvlist_lookup_nvlist_array(config,
ZPOOL_CONFIG_CHILDREN, &child, &children) != 0) {
if (nvlist_lookup_uint64(config,
ZPOOL_CONFIG_WHOLE_DISK,
&wholedisk) != 0 || !wholedisk) {
return (MAXOFFSET_T);
}
if (read_efi_label(config, &sb) < 0)
sb = MAXOFFSET_T;
return (sb);
}
for (c = 0; c < children; c++) {
sb = find_start_block(child[c]);
if (sb != MAXOFFSET_T) {
return (sb);
}
}
return (MAXOFFSET_T);
}
/*
* Label an individual disk. The name provided is the short name,
* stripped of any leading /dev path.
*/
int
zpool_label_disk(libzfs_handle_t *hdl, zpool_handle_t *zhp, char *name)
{
char path[MAXPATHLEN];
struct dk_gpt *vtoc;
int fd;
size_t resv = EFI_MIN_RESV_SIZE;
uint64_t slice_size;
diskaddr_t start_block;
char errbuf[1024];
/* prepare an error message just in case */
(void) snprintf(errbuf, sizeof (errbuf),
dgettext(TEXT_DOMAIN, "cannot label '%s'"), name);
if (zhp) {
nvlist_t *nvroot;
if (pool_is_bootable(zhp)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"EFI labeled devices are not supported on root "
"pools."));
return (zfs_error(hdl, EZFS_POOL_NOTSUP, errbuf));
}
verify(nvlist_lookup_nvlist(zhp->zpool_config,
ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
if (zhp->zpool_start_block == 0)
start_block = find_start_block(nvroot);
else
start_block = zhp->zpool_start_block;
zhp->zpool_start_block = start_block;
} else {
/* new pool */
start_block = NEW_START_BLOCK;
}
(void) snprintf(path, sizeof (path), "%s/%s%s", RDISK_ROOT, name,
BACKUP_SLICE);
if ((fd = open(path, O_RDWR | O_NDELAY)) < 0) {
/*
* This shouldn't happen. We've long since verified that this
* is a valid device.
*/
zfs_error_aux(hdl,
dgettext(TEXT_DOMAIN, "unable to open device"));
return (zfs_error(hdl, EZFS_OPENFAILED, errbuf));
}
if (efi_alloc_and_init(fd, EFI_NUMPAR, &vtoc) != 0) {
/*
* The only way this can fail is if we run out of memory, or we
* were unable to read the disk's capacity
*/
if (errno == ENOMEM)
(void) no_memory(hdl);
(void) close(fd);
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"unable to read disk capacity"), name);
return (zfs_error(hdl, EZFS_NOCAP, errbuf));
}
slice_size = vtoc->efi_last_u_lba + 1;
slice_size -= EFI_MIN_RESV_SIZE;
if (start_block == MAXOFFSET_T)
start_block = NEW_START_BLOCK;
slice_size -= start_block;
vtoc->efi_parts[0].p_start = start_block;
vtoc->efi_parts[0].p_size = slice_size;
/*
* Why we use V_USR: V_BACKUP confuses users, and is considered
* disposable by some EFI utilities (since EFI doesn't have a backup
* slice). V_UNASSIGNED is supposed to be used only for zero size
* partitions, and efi_write() will fail if we use it. V_ROOT, V_BOOT,
* etc. were all pretty specific. V_USR is as close to reality as we
* can get, in the absence of V_OTHER.
*/
vtoc->efi_parts[0].p_tag = V_USR;
(void) strcpy(vtoc->efi_parts[0].p_name, "zfs");
vtoc->efi_parts[8].p_start = slice_size + start_block;
vtoc->efi_parts[8].p_size = resv;
vtoc->efi_parts[8].p_tag = V_RESERVED;
if (efi_write(fd, vtoc) != 0) {
/*
* Some block drivers (like pcata) may not support EFI
* GPT labels. Print out a helpful error message dir-
* ecting the user to manually label the disk and give
* a specific slice.
*/
(void) close(fd);
efi_free(vtoc);
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"try using fdisk(1M) and then provide a specific slice"));
return (zfs_error(hdl, EZFS_LABELFAILED, errbuf));
}
(void) close(fd);
efi_free(vtoc);
return (0);
}
static boolean_t
supported_dump_vdev_type(libzfs_handle_t *hdl, nvlist_t *config, char *errbuf)
{
char *type;
nvlist_t **child;
uint_t children, c;
verify(nvlist_lookup_string(config, ZPOOL_CONFIG_TYPE, &type) == 0);
if (strcmp(type, VDEV_TYPE_RAIDZ) == 0 ||
strcmp(type, VDEV_TYPE_FILE) == 0 ||
strcmp(type, VDEV_TYPE_LOG) == 0 ||
strcmp(type, VDEV_TYPE_HOLE) == 0 ||
strcmp(type, VDEV_TYPE_MISSING) == 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"vdev type '%s' is not supported"), type);
(void) zfs_error(hdl, EZFS_VDEVNOTSUP, errbuf);
return (B_FALSE);
}
if (nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_CHILDREN,
&child, &children) == 0) {
for (c = 0; c < children; c++) {
if (!supported_dump_vdev_type(hdl, child[c], errbuf))
return (B_FALSE);
}
}
return (B_TRUE);
}
/*
* check if this zvol is allowable for use as a dump device; zero if
* it is, > 0 if it isn't, < 0 if it isn't a zvol
*/
int
zvol_check_dump_config(char *arg)
{
zpool_handle_t *zhp = NULL;
nvlist_t *config, *nvroot;
char *p, *volname;
nvlist_t **top;
uint_t toplevels;
libzfs_handle_t *hdl;
char errbuf[1024];
char poolname[ZPOOL_MAXNAMELEN];
int pathlen = strlen(ZVOL_FULL_DEV_DIR);
int ret = 1;
if (strncmp(arg, ZVOL_FULL_DEV_DIR, pathlen)) {
return (-1);
}
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"dump is not supported on device '%s'"), arg);
if ((hdl = libzfs_init()) == NULL)
return (1);
libzfs_print_on_error(hdl, B_TRUE);
volname = arg + pathlen;
/* check the configuration of the pool */
if ((p = strchr(volname, '/')) == NULL) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"malformed dataset name"));
(void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
return (1);
} else if (p - volname >= ZFS_MAXNAMELEN) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"dataset name is too long"));
(void) zfs_error(hdl, EZFS_NAMETOOLONG, errbuf);
return (1);
} else {
(void) strncpy(poolname, volname, p - volname);
poolname[p - volname] = '\0';
}
if ((zhp = zpool_open(hdl, poolname)) == NULL) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"could not open pool '%s'"), poolname);
(void) zfs_error(hdl, EZFS_OPENFAILED, errbuf);
goto out;
}
config = zpool_get_config(zhp, NULL);
if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
&nvroot) != 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"could not obtain vdev configuration for '%s'"), poolname);
(void) zfs_error(hdl, EZFS_INVALCONFIG, errbuf);
goto out;
}
verify(nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
&top, &toplevels) == 0);
if (toplevels != 1) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' has multiple top level vdevs"), poolname);
(void) zfs_error(hdl, EZFS_DEVOVERFLOW, errbuf);
goto out;
}
if (!supported_dump_vdev_type(hdl, top[0], errbuf)) {
goto out;
}
ret = 0;
out:
if (zhp)
zpool_close(zhp);
libzfs_fini(hdl);
return (ret);
}
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