/*
* 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/param.h>
#include <sys/buf.h>
#include <sys/cmn_err.h>
#include <sys/conf.h>
#include <sys/dmu.h>
#include <sys/dmu_impl.h>
#include <sys/dmu_objset.h>
#include <sys/dmu_send.h>
#include <sys/dmu_tx.h>
#include <sys/dsl_bookmark.h>
#include <sys/dsl_crypt.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_deleg.h>
#include <sys/dsl_destroy.h>
#include <sys/dsl_dir.h>
#include <sys/dsl_prop.h>
#include <sys/dsl_scan.h>
#include <sys/dsl_userhold.h>
#include <sys/errno.h>
#include <sys/eventhandler.h>
#include <sys/file.h>
#include <sys/fm/util.h>
#include <sys/fs/zfs.h>
#include <sys/kernel.h>
#include <sys/kmem.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/nvpair.h>
#include <sys/policy.h>
#include <sys/proc.h>
#include <sys/sdt.h>
#include <sys/spa.h>
#include <sys/spa_impl.h>
#include <sys/stat.h>
#include <sys/sunddi.h>
#include <sys/systm.h>
#include <sys/taskqueue.h>
#include <sys/uio.h>
#include <sys/vdev.h>
#include <sys/vdev_removal.h>
#include <sys/zap.h>
#include <sys/zcp.h>
#include <sys/zfeature.h>
#include <sys/zfs_context.h>
#include <sys/zfs_ctldir.h>
#include <sys/zfs_dir.h>
#include <sys/zfs_ioctl.h>
#include <sys/zfs_ioctl_compat.h>
#include <sys/zfs_ioctl_impl.h>
#include <sys/zfs_onexit.h>
#include <sys/zfs_vfsops.h>
#include <sys/zfs_znode.h>
#include <sys/zio_checksum.h>
#include <sys/zone.h>
#include <sys/zvol.h>
#include "zfs_comutil.h"
#include "zfs_deleg.h"
#include "zfs_namecheck.h"
#include "zfs_prop.h"
SYSCTL_DECL(_vfs_zfs);
SYSCTL_DECL(_vfs_zfs_vdev);
extern uint_t rrw_tsd_key;
static int zfs_version_ioctl = ZFS_IOCVER_OZFS;
SYSCTL_DECL(_vfs_zfs_version);
SYSCTL_INT(_vfs_zfs_version, OID_AUTO, ioctl, CTLFLAG_RD, &zfs_version_ioctl,
0, "ZFS_IOCTL_VERSION");
static struct cdev *zfsdev;
static struct root_hold_token *zfs_root_token;
extern uint_t rrw_tsd_key;
extern uint_t zfs_allow_log_key;
extern uint_t zfs_geom_probe_vdev_key;
static int zfs__init(void);
static int zfs__fini(void);
static void zfs_shutdown(void *, int);
static eventhandler_tag zfs_shutdown_event_tag;
#define ZFS_MIN_KSTACK_PAGES 4
static int
zfsdev_ioctl(struct cdev *dev, ulong_t zcmd, caddr_t arg, int flag,
struct thread *td)
{
uint_t len;
int vecnum;
zfs_iocparm_t *zp;
zfs_cmd_t *zc;
zfs_cmd_legacy_t *zcl;
int rc, error;
void *uaddr;
len = IOCPARM_LEN(zcmd);
vecnum = zcmd & 0xff;
zp = (void *)arg;
uaddr = (void *)zp->zfs_cmd;
error = 0;
zcl = NULL;
if (len != sizeof (zfs_iocparm_t)) {
printf("len %d vecnum: %d sizeof (zfs_cmd_t) %ju\n",
len, vecnum, (uintmax_t)sizeof (zfs_cmd_t));
return (EINVAL);
}
zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
/*
* Remap ioctl code for legacy user binaries
*/
if (zp->zfs_ioctl_version == ZFS_IOCVER_LEGACY) {
vecnum = zfs_ioctl_legacy_to_ozfs(vecnum);
if (vecnum < 0) {
kmem_free(zc, sizeof (zfs_cmd_t));
return (ENOTSUP);
}
zcl = kmem_zalloc(sizeof (zfs_cmd_legacy_t), KM_SLEEP);
if (copyin(uaddr, zcl, sizeof (zfs_cmd_legacy_t))) {
error = SET_ERROR(EFAULT);
goto out;
}
zfs_cmd_legacy_to_ozfs(zcl, zc);
} else if (copyin(uaddr, zc, sizeof (zfs_cmd_t))) {
error = SET_ERROR(EFAULT);
goto out;
}
error = zfsdev_ioctl_common(vecnum, zc, 0);
if (zcl) {
zfs_cmd_ozfs_to_legacy(zc, zcl);
rc = copyout(zcl, uaddr, sizeof (*zcl));
} else {
rc = copyout(zc, uaddr, sizeof (*zc));
}
if (error == 0 && rc != 0)
error = SET_ERROR(EFAULT);
out:
if (zcl)
kmem_free(zcl, sizeof (zfs_cmd_legacy_t));
kmem_free(zc, sizeof (zfs_cmd_t));
MPASS(tsd_get(rrw_tsd_key) == NULL);
return (error);
}
static void
zfsdev_close(void *data)
{
zfsdev_state_destroy(data);
}
void
zfsdev_private_set_state(void *priv __unused, zfsdev_state_t *zs)
{
devfs_set_cdevpriv(zs, zfsdev_close);
}
zfsdev_state_t *
zfsdev_private_get_state(void *priv)
{
return (priv);
}
static int
zfsdev_open(struct cdev *devp __unused, int flag __unused, int mode __unused,
struct thread *td __unused)
{
int error;
mutex_enter(&zfsdev_state_lock);
error = zfsdev_state_init(NULL);
mutex_exit(&zfsdev_state_lock);
return (error);
}
static struct cdevsw zfs_cdevsw = {
.d_version = D_VERSION,
.d_open = zfsdev_open,
.d_ioctl = zfsdev_ioctl,
.d_name = ZFS_DRIVER
};
int
zfsdev_attach(void)
{
zfsdev = make_dev(&zfs_cdevsw, 0x0, UID_ROOT, GID_OPERATOR, 0666,
ZFS_DRIVER);
return (0);
}
void
zfsdev_detach(void)
{
if (zfsdev != NULL)
destroy_dev(zfsdev);
}
int
zfs__init(void)
{
int error;
#if KSTACK_PAGES < ZFS_MIN_KSTACK_PAGES
printf("ZFS NOTICE: KSTACK_PAGES is %d which could result in stack "
"overflow panic!\nPlease consider adding "
"'options KSTACK_PAGES=%d' to your kernel config\n", KSTACK_PAGES,
ZFS_MIN_KSTACK_PAGES);
#endif
zfs_root_token = root_mount_hold("ZFS");
if ((error = zfs_kmod_init()) != 0) {
printf("ZFS: Failed to Load ZFS Filesystem"
", rc = %d\n", error);
root_mount_rel(zfs_root_token);
return (error);
}
tsd_create(&zfs_geom_probe_vdev_key, NULL);
printf("ZFS storage pool version: features support ("
SPA_VERSION_STRING ")\n");
root_mount_rel(zfs_root_token);
ddi_sysevent_init();
return (0);
}
int
zfs__fini(void)
{
if (zfs_busy() || zvol_busy() ||
zio_injection_enabled) {
return (EBUSY);
}
zfs_kmod_fini();
tsd_destroy(&zfs_geom_probe_vdev_key);
return (0);
}
static void
zfs_shutdown(void *arg __unused, int howto __unused)
{
/*
* ZFS fini routines can not properly work in a panic-ed system.
*/
if (panicstr == NULL)
zfs__fini();
}
static int
zfs_modevent(module_t mod, int type, void *unused __unused)
{
int err;
switch (type) {
case MOD_LOAD:
err = zfs__init();
if (err == 0)
zfs_shutdown_event_tag = EVENTHANDLER_REGISTER(
shutdown_post_sync, zfs_shutdown, NULL,
SHUTDOWN_PRI_FIRST);
return (err);
case MOD_UNLOAD:
err = zfs__fini();
if (err == 0 && zfs_shutdown_event_tag != NULL)
EVENTHANDLER_DEREGISTER(shutdown_post_sync,
zfs_shutdown_event_tag);
return (err);
case MOD_SHUTDOWN:
return (0);
default:
break;
}
return (EOPNOTSUPP);
}
static moduledata_t zfs_mod = {
"zfsctrl",
zfs_modevent,
0
};
#ifdef _KERNEL
EVENTHANDLER_DEFINE(mountroot, spa_boot_init, NULL, 0);
#endif
DECLARE_MODULE(zfsctrl, zfs_mod, SI_SUB_CLOCKS, SI_ORDER_ANY);
MODULE_VERSION(zfsctrl, 1);
#if __FreeBSD_version > 1300092
MODULE_DEPEND(zfsctrl, xdr, 1, 1, 1);
#else
MODULE_DEPEND(zfsctrl, krpc, 1, 1, 1);
#endif
MODULE_DEPEND(zfsctrl, acl_nfs4, 1, 1, 1);
MODULE_DEPEND(zfsctrl, crypto, 1, 1, 1);
