349 lines
8.1 KiB
C
349 lines
8.1 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/param.h>
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#include <sys/buf.h>
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#include <sys/cmn_err.h>
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#include <sys/conf.h>
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#include <sys/dmu.h>
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#include <sys/dmu_impl.h>
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#include <sys/dmu_objset.h>
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#include <sys/dmu_send.h>
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#include <sys/dmu_tx.h>
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#include <sys/dsl_bookmark.h>
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#include <sys/dsl_crypt.h>
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#include <sys/dsl_dataset.h>
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#include <sys/dsl_deleg.h>
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#include <sys/dsl_destroy.h>
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#include <sys/dsl_dir.h>
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#include <sys/dsl_prop.h>
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#include <sys/dsl_scan.h>
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#include <sys/dsl_userhold.h>
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#include <sys/errno.h>
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#include <sys/eventhandler.h>
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#include <sys/file.h>
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#include <sys/fm/util.h>
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#include <sys/fs/zfs.h>
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#include <sys/kernel.h>
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#include <sys/kmem.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/mutex.h>
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#include <sys/nvpair.h>
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#include <sys/policy.h>
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#include <sys/proc.h>
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#include <sys/sdt.h>
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#include <sys/spa.h>
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#include <sys/spa_impl.h>
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#include <sys/stat.h>
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#include <sys/sunddi.h>
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#include <sys/systm.h>
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#include <sys/taskqueue.h>
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#include <sys/uio.h>
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#include <sys/vdev.h>
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#include <sys/vdev_removal.h>
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#include <sys/zap.h>
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#include <sys/zcp.h>
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#include <sys/zfeature.h>
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#include <sys/zfs_context.h>
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#include <sys/zfs_ctldir.h>
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#include <sys/zfs_dir.h>
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#include <sys/zfs_ioctl.h>
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#include <sys/zfs_ioctl_compat.h>
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#include <sys/zfs_ioctl_impl.h>
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#include <sys/zfs_onexit.h>
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#include <sys/zfs_vfsops.h>
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#include <sys/zfs_znode.h>
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#include <sys/zio_checksum.h>
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#include <sys/zone.h>
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#include <sys/zvol.h>
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#include "zfs_comutil.h"
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#include "zfs_deleg.h"
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#include "zfs_namecheck.h"
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#include "zfs_prop.h"
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SYSCTL_DECL(_vfs_zfs);
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SYSCTL_DECL(_vfs_zfs_vdev);
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extern uint_t rrw_tsd_key;
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static int zfs_version_ioctl = ZFS_IOCVER_OZFS;
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SYSCTL_DECL(_vfs_zfs_version);
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SYSCTL_INT(_vfs_zfs_version, OID_AUTO, ioctl, CTLFLAG_RD, &zfs_version_ioctl,
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0, "ZFS_IOCTL_VERSION");
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static struct cdev *zfsdev;
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static struct root_hold_token *zfs_root_token;
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extern uint_t rrw_tsd_key;
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extern uint_t zfs_allow_log_key;
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extern uint_t zfs_geom_probe_vdev_key;
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static int zfs__init(void);
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static int zfs__fini(void);
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static void zfs_shutdown(void *, int);
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static eventhandler_tag zfs_shutdown_event_tag;
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#define ZFS_MIN_KSTACK_PAGES 4
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static int
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zfsdev_ioctl(struct cdev *dev, ulong_t zcmd, caddr_t arg, int flag,
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struct thread *td)
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{
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uint_t len;
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int vecnum;
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zfs_iocparm_t *zp;
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zfs_cmd_t *zc;
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#ifdef ZFS_LEGACY_SUPPORT
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zfs_cmd_legacy_t *zcl;
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#endif
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int rc, error;
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void *uaddr;
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len = IOCPARM_LEN(zcmd);
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vecnum = zcmd & 0xff;
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zp = (void *)arg;
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error = 0;
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#ifdef ZFS_LEGACY_SUPPORT
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zcl = NULL;
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#endif
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if (len != sizeof (zfs_iocparm_t))
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return (EINVAL);
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uaddr = (void *)zp->zfs_cmd;
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zc = vmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
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#ifdef ZFS_LEGACY_SUPPORT
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/*
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* Remap ioctl code for legacy user binaries
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*/
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if (zp->zfs_ioctl_version == ZFS_IOCVER_LEGACY) {
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vecnum = zfs_ioctl_legacy_to_ozfs(vecnum);
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if (vecnum < 0) {
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vmem_free(zc, sizeof (zfs_cmd_t));
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return (ENOTSUP);
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}
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zcl = vmem_zalloc(sizeof (zfs_cmd_legacy_t), KM_SLEEP);
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if (copyin(uaddr, zcl, sizeof (zfs_cmd_legacy_t))) {
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error = SET_ERROR(EFAULT);
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goto out;
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}
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zfs_cmd_legacy_to_ozfs(zcl, zc);
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} else
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#endif
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if (copyin(uaddr, zc, sizeof (zfs_cmd_t))) {
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error = SET_ERROR(EFAULT);
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goto out;
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}
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error = zfsdev_ioctl_common(vecnum, zc, 0);
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#ifdef ZFS_LEGACY_SUPPORT
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if (zcl) {
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zfs_cmd_ozfs_to_legacy(zc, zcl);
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rc = copyout(zcl, uaddr, sizeof (*zcl));
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} else
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#endif
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{
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rc = copyout(zc, uaddr, sizeof (*zc));
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}
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if (error == 0 && rc != 0)
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error = SET_ERROR(EFAULT);
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out:
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#ifdef ZFS_LEGACY_SUPPORT
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if (zcl)
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vmem_free(zcl, sizeof (zfs_cmd_legacy_t));
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#endif
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vmem_free(zc, sizeof (zfs_cmd_t));
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MPASS(tsd_get(rrw_tsd_key) == NULL);
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return (error);
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}
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static void
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zfsdev_close(void *data)
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{
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zfsdev_state_destroy(data);
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}
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void
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zfsdev_private_set_state(void *priv __unused, zfsdev_state_t *zs)
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{
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devfs_set_cdevpriv(zs, zfsdev_close);
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}
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zfsdev_state_t *
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zfsdev_private_get_state(void *priv)
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{
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return (priv);
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}
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static int
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zfsdev_open(struct cdev *devp __unused, int flag __unused, int mode __unused,
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struct thread *td __unused)
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{
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int error;
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mutex_enter(&zfsdev_state_lock);
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error = zfsdev_state_init(NULL);
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mutex_exit(&zfsdev_state_lock);
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return (error);
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}
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static struct cdevsw zfs_cdevsw = {
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.d_version = D_VERSION,
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.d_open = zfsdev_open,
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.d_ioctl = zfsdev_ioctl,
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.d_name = ZFS_DRIVER
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};
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int
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zfsdev_attach(void)
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{
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struct make_dev_args args;
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make_dev_args_init(&args);
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args.mda_flags = MAKEDEV_CHECKNAME | MAKEDEV_WAITOK;
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args.mda_devsw = &zfs_cdevsw;
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args.mda_cr = NULL;
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args.mda_uid = UID_ROOT;
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args.mda_gid = GID_OPERATOR;
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args.mda_mode = 0666;
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return (make_dev_s(&args, &zfsdev, ZFS_DRIVER));
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}
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void
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zfsdev_detach(void)
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{
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if (zfsdev != NULL)
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destroy_dev(zfsdev);
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}
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int
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zfs__init(void)
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{
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int error;
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#if KSTACK_PAGES < ZFS_MIN_KSTACK_PAGES
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printf("ZFS NOTICE: KSTACK_PAGES is %d which could result in stack "
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"overflow panic!\nPlease consider adding "
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"'options KSTACK_PAGES=%d' to your kernel config\n", KSTACK_PAGES,
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ZFS_MIN_KSTACK_PAGES);
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#endif
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zfs_root_token = root_mount_hold("ZFS");
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if ((error = zfs_kmod_init()) != 0) {
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printf("ZFS: Failed to Load ZFS Filesystem"
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", rc = %d\n", error);
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root_mount_rel(zfs_root_token);
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return (error);
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}
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tsd_create(&zfs_geom_probe_vdev_key, NULL);
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printf("ZFS storage pool version: features support ("
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SPA_VERSION_STRING ")\n");
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root_mount_rel(zfs_root_token);
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ddi_sysevent_init();
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return (0);
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}
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int
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zfs__fini(void)
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{
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if (zfs_busy() || zvol_busy() ||
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zio_injection_enabled) {
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return (EBUSY);
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}
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zfs_kmod_fini();
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tsd_destroy(&zfs_geom_probe_vdev_key);
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return (0);
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}
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static void
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zfs_shutdown(void *arg __unused, int howto __unused)
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{
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/*
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* ZFS fini routines can not properly work in a panic-ed system.
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*/
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if (panicstr == NULL)
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zfs__fini();
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}
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static int
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zfs_modevent(module_t mod, int type, void *unused __unused)
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{
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int err;
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switch (type) {
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case MOD_LOAD:
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err = zfs__init();
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if (err == 0)
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zfs_shutdown_event_tag = EVENTHANDLER_REGISTER(
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shutdown_post_sync, zfs_shutdown, NULL,
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SHUTDOWN_PRI_FIRST);
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return (err);
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case MOD_UNLOAD:
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err = zfs__fini();
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if (err == 0 && zfs_shutdown_event_tag != NULL)
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EVENTHANDLER_DEREGISTER(shutdown_post_sync,
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zfs_shutdown_event_tag);
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return (err);
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case MOD_SHUTDOWN:
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return (0);
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default:
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break;
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}
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return (EOPNOTSUPP);
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}
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static moduledata_t zfs_mod = {
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"zfsctrl",
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zfs_modevent,
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0
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};
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#ifdef _KERNEL
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EVENTHANDLER_DEFINE(mountroot, spa_boot_init, NULL, 0);
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#endif
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DECLARE_MODULE(zfsctrl, zfs_mod, SI_SUB_CLOCKS, SI_ORDER_ANY);
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MODULE_VERSION(zfsctrl, 1);
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#if __FreeBSD_version > 1300092
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MODULE_DEPEND(zfsctrl, xdr, 1, 1, 1);
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#else
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MODULE_DEPEND(zfsctrl, krpc, 1, 1, 1);
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#endif
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MODULE_DEPEND(zfsctrl, acl_nfs4, 1, 1, 1);
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MODULE_DEPEND(zfsctrl, crypto, 1, 1, 1);
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MODULE_DEPEND(zfsctrl, zlib, 1, 1, 1);
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