/*
* Copyright (c) 2020 iXsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/nvpair.h>
#include <sys/spa_impl.h>
#include <sys/vdev_os.h>
#include <sys/zfs_vfsops.h>
#include <sys/zone.h>
#include <vm/vm_pageout.h>
#include <sys/zfs_ioctl_impl.h>
#if __FreeBSD_version < 1201517
#define vm_page_max_user_wired vm_page_max_wired
#endif
int
zfs_vfs_ref(zfsvfs_t **zfvp)
{
int error = 0;
if (*zfvp == NULL)
return (SET_ERROR(ESRCH));
error = vfs_busy((*zfvp)->z_vfs, 0);
if (error != 0) {
*zfvp = NULL;
error = SET_ERROR(ESRCH);
}
return (error);
}
int
zfs_vfs_held(zfsvfs_t *zfsvfs)
{
return (zfsvfs->z_vfs != NULL);
}
void
zfs_vfs_rele(zfsvfs_t *zfsvfs)
{
vfs_unbusy(zfsvfs->z_vfs);
}
static const zfs_ioc_key_t zfs_keys_nextboot[] = {
{"command", DATA_TYPE_STRING, 0},
{ ZPOOL_CONFIG_POOL_GUID, DATA_TYPE_UINT64, 0},
{ ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64, 0}
};
static int
zfs_ioc_jail(zfs_cmd_t *zc)
{
return (zone_dataset_attach(curthread->td_ucred, zc->zc_name,
(int)zc->zc_zoneid));
}
static int
zfs_ioc_unjail(zfs_cmd_t *zc)
{
return (zone_dataset_detach(curthread->td_ucred, zc->zc_name,
(int)zc->zc_zoneid));
}
static int
zfs_ioc_nextboot(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
{
char name[MAXNAMELEN];
spa_t *spa;
vdev_t *vd;
char *command;
uint64_t pool_guid;
uint64_t vdev_guid;
int error;
if (nvlist_lookup_uint64(innvl,
ZPOOL_CONFIG_POOL_GUID, &pool_guid) != 0)
return (EINVAL);
if (nvlist_lookup_uint64(innvl,
ZPOOL_CONFIG_GUID, &vdev_guid) != 0)
return (EINVAL);
if (nvlist_lookup_string(innvl,
"command", &command) != 0)
return (EINVAL);
mutex_enter(&spa_namespace_lock);
spa = spa_by_guid(pool_guid, vdev_guid);
if (spa != NULL)
strcpy(name, spa_name(spa));
mutex_exit(&spa_namespace_lock);
if (spa == NULL)
return (ENOENT);
if ((error = spa_open(name, &spa, FTAG)) != 0)
return (error);
spa_vdev_state_enter(spa, SCL_ALL);
vd = spa_lookup_by_guid(spa, vdev_guid, B_TRUE);
if (vd == NULL) {
(void) spa_vdev_state_exit(spa, NULL, ENXIO);
spa_close(spa, FTAG);
return (ENODEV);
}
error = vdev_label_write_pad2(vd, command, strlen(command));
(void) spa_vdev_state_exit(spa, NULL, 0);
txg_wait_synced(spa->spa_dsl_pool, 0);
spa_close(spa, FTAG);
return (error);
}
uint64_t
zfs_max_nvlist_src_size_os(void)
{
if (zfs_max_nvlist_src_size != 0)
return (zfs_max_nvlist_src_size);
return (ptob(vm_page_max_user_wired) / 4);
}
void
zfs_ioctl_init_os(void)
{
zfs_ioctl_register_dataset_nolog(ZFS_IOC_JAIL, zfs_ioc_jail,
zfs_secpolicy_config, POOL_CHECK_NONE);
zfs_ioctl_register_dataset_nolog(ZFS_IOC_UNJAIL, zfs_ioc_unjail,
zfs_secpolicy_config, POOL_CHECK_NONE);
zfs_ioctl_register("fbsd_nextboot", ZFS_IOC_NEXTBOOT,
zfs_ioc_nextboot, zfs_secpolicy_config, NO_NAME,
POOL_CHECK_NONE, B_FALSE, B_FALSE, zfs_keys_nextboot, 3);
}
