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