diff options
Diffstat (limited to 'sys/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c')
| -rw-r--r-- | sys/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c | 1826 |
1 files changed, 0 insertions, 1826 deletions
diff --git a/sys/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c b/sys/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c deleted file mode 100644 index c9424be..0000000 --- a/sys/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c +++ /dev/null @@ -1,1826 +0,0 @@ -/* - * 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 2007 Sun Microsystems, Inc. All rights reserved. - * Use is subject to license terms. - */ - -#pragma ident "%Z%%M% %I% %E% SMI" - -#include <sys/types.h> -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/conf.h> -#include <sys/kernel.h> -#include <sys/lock.h> -#include <sys/malloc.h> -#include <sys/mutex.h> -#include <sys/proc.h> -#include <sys/errno.h> -#include <sys/uio.h> -#include <sys/buf.h> -#include <sys/file.h> -#include <sys/kmem.h> -#include <sys/conf.h> -#include <sys/cmn_err.h> -#include <sys/stat.h> -#include <sys/zfs_ioctl.h> -#include <sys/zap.h> -#include <sys/spa.h> -#include <sys/spa_impl.h> -#include <sys/vdev.h> -#include <sys/vdev_impl.h> -#include <sys/dmu.h> -#include <sys/dsl_dir.h> -#include <sys/dsl_dataset.h> -#include <sys/dsl_prop.h> -#include <sys/sunddi.h> -#include <sys/policy.h> -#include <sys/zone.h> -#include <sys/nvpair.h> -#include <sys/mount.h> -#include <sys/taskqueue.h> -#include <sys/sdt.h> -#include <sys/varargs.h> -#include <sys/fs/zfs.h> -#include <sys/zfs_ctldir.h> -#include <sys/zvol.h> - -#include "zfs_namecheck.h" -#include "zfs_prop.h" - -CTASSERT(sizeof(zfs_cmd_t) <= PAGE_SIZE); - -static struct cdev *zfsdev; - -extern void zfs_init(void); -extern void zfs_fini(void); - -typedef int zfs_ioc_func_t(zfs_cmd_t *); -typedef int zfs_secpolicy_func_t(const char *, cred_t *); - -typedef struct zfs_ioc_vec { - zfs_ioc_func_t *zvec_func; - zfs_secpolicy_func_t *zvec_secpolicy; - enum { - no_name, - pool_name, - dataset_name - } zvec_namecheck; -} zfs_ioc_vec_t; - -/* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */ -void -__dprintf(const char *file, const char *func, int line, const char *fmt, ...) -{ - const char *newfile; - char buf[256]; - va_list adx; - - /* - * Get rid of annoying "../common/" prefix to filename. - */ - newfile = strrchr(file, '/'); - if (newfile != NULL) { - newfile = newfile + 1; /* Get rid of leading / */ - } else { - newfile = file; - } - - va_start(adx, fmt); - (void) vsnprintf(buf, sizeof (buf), fmt, adx); - va_end(adx); - - /* - * To get this data, use the zfs-dprintf probe as so: - * dtrace -q -n 'zfs-dprintf \ - * /stringof(arg0) == "dbuf.c"/ \ - * {printf("%s: %s", stringof(arg1), stringof(arg3))}' - * arg0 = file name - * arg1 = function name - * arg2 = line number - * arg3 = message - */ - DTRACE_PROBE4(zfs__dprintf, - char *, newfile, char *, func, int, line, char *, buf); -} - -/* - * Policy for top-level read operations (list pools). Requires no privileges, - * and can be used in the local zone, as there is no associated dataset. - */ -/* ARGSUSED */ -static int -zfs_secpolicy_none(const char *unused1, cred_t *cr) -{ - return (0); -} - -/* - * Policy for dataset read operations (list children, get statistics). Requires - * no privileges, but must be visible in the local zone. - */ -/* ARGSUSED */ -static int -zfs_secpolicy_read(const char *dataset, cred_t *cr) -{ - if (INGLOBALZONE(curproc) || - zone_dataset_visible(dataset, NULL)) - return (0); - - return (ENOENT); -} - -static int -zfs_dozonecheck(const char *dataset, cred_t *cr) -{ - uint64_t zoned; - int writable = 1; - - /* - * The dataset must be visible by this zone -- check this first - * so they don't see EPERM on something they shouldn't know about. - */ - if (!INGLOBALZONE(curproc) && - !zone_dataset_visible(dataset, &writable)) - return (ENOENT); - - if (dsl_prop_get_integer(dataset, "jailed", &zoned, NULL)) - return (ENOENT); - - if (INGLOBALZONE(curproc)) { - /* - * If the fs is zoned, only root can access it from the - * global zone. - */ - if (secpolicy_zfs(cr) && zoned) - return (EPERM); - } else { - /* - * If we are in a local zone, the 'zoned' property must be set. - */ - if (!zoned) - return (EPERM); - - /* must be writable by this zone */ - if (!writable) - return (EPERM); - } - return (0); -} - -/* - * Policy for dataset write operations (create children, set properties, etc). - * Requires SYS_MOUNT privilege, and must be writable in the local zone. - */ -int -zfs_secpolicy_write(const char *dataset, cred_t *cr) -{ - int error; - - if (error = zfs_dozonecheck(dataset, cr)) - return (error); - - return (secpolicy_zfs(cr)); -} - -/* - * Policy for operations that want to write a dataset's parent: - * create, destroy, snapshot, clone, restore. - */ -static int -zfs_secpolicy_parent(const char *dataset, cred_t *cr) -{ - char parentname[MAXNAMELEN]; - char *cp; - - /* - * Remove the @bla or /bla from the end of the name to get the parent. - */ - (void) strncpy(parentname, dataset, sizeof (parentname)); - cp = strrchr(parentname, '@'); - if (cp != NULL) { - cp[0] = '\0'; - } else { - cp = strrchr(parentname, '/'); - if (cp == NULL) - return (ENOENT); - cp[0] = '\0'; - - } - - return (zfs_secpolicy_write(parentname, cr)); -} - -/* - * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires - * SYS_CONFIG privilege, which is not available in a local zone. - */ -/* ARGSUSED */ -static int -zfs_secpolicy_config(const char *unused, cred_t *cr) -{ - if (secpolicy_sys_config(cr, B_FALSE) != 0) - return (EPERM); - - return (0); -} - -/* - * Policy for fault injection. Requires all privileges. - */ -/* ARGSUSED */ -static int -zfs_secpolicy_inject(const char *unused, cred_t *cr) -{ - return (secpolicy_zinject(cr)); -} - -/* - * Policy for dataset backup operations (sendbackup). - * Requires SYS_MOUNT privilege, and must be writable in the local zone. - */ -static int -zfs_secpolicy_operator(const char *dataset, cred_t *cr) -{ - int writable = 1; - - if (!INGLOBALZONE(curproc) && !zone_dataset_visible(dataset, &writable)) - return (ENOENT); - if (secpolicy_zfs(cr) != 0 && !groupmember(GID_OPERATOR, cr)) - return (EPERM); - return (0); -} - -/* - * Returns the nvlist as specified by the user in the zfs_cmd_t. - */ -static int -get_nvlist(zfs_cmd_t *zc, nvlist_t **nvp) -{ - char *packed; - size_t size; - int error; - nvlist_t *config = NULL; - - /* - * Read in and unpack the user-supplied nvlist. - */ - if ((size = zc->zc_nvlist_src_size) == 0) - return (EINVAL); - - packed = kmem_alloc(size, KM_SLEEP); - - if ((error = xcopyin((void *)(uintptr_t)zc->zc_nvlist_src, packed, - size)) != 0) { - kmem_free(packed, size); - return (error); - } - - if ((error = nvlist_unpack(packed, size, &config, 0)) != 0) { - kmem_free(packed, size); - return (error); - } - - kmem_free(packed, size); - - *nvp = config; - return (0); -} - -static int -put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) -{ - char *packed = NULL; - size_t size; - int error; - - VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0); - - if (size > zc->zc_nvlist_dst_size) { - /* - * Solaris returns ENOMEM here, because even if an error is - * returned from an ioctl(2), new zc_nvlist_dst_size will be - * passed to the userland. This is not the case for FreeBSD. - * We need to return 0, so the kernel will copy the - * zc_nvlist_dst_size back and the userland can discover that a - * bigger buffer is needed. - */ - error = 0; - } else { - VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE, - KM_SLEEP) == 0); - error = xcopyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, - size); - kmem_free(packed, size); - } - - zc->zc_nvlist_dst_size = size; - return (error); -} - -static int -zfs_ioc_pool_create(zfs_cmd_t *zc) -{ - int error; - nvlist_t *config; - - if ((error = get_nvlist(zc, &config)) != 0) - return (error); - - error = spa_create(zc->zc_name, config, zc->zc_value[0] == '\0' ? - NULL : zc->zc_value); - - nvlist_free(config); - - return (error); -} - -static int -zfs_ioc_pool_destroy(zfs_cmd_t *zc) -{ - return (spa_destroy(zc->zc_name)); -} - -static int -zfs_ioc_pool_import(zfs_cmd_t *zc) -{ - int error; - nvlist_t *config; - uint64_t guid; - - if ((error = get_nvlist(zc, &config)) != 0) - return (error); - - if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || - guid != zc->zc_guid) - error = EINVAL; - else - error = spa_import(zc->zc_name, config, - zc->zc_value[0] == '\0' ? NULL : zc->zc_value); - - nvlist_free(config); - - return (error); -} - -static int -zfs_ioc_pool_export(zfs_cmd_t *zc) -{ - return (spa_export(zc->zc_name, NULL)); -} - -static int -zfs_ioc_pool_configs(zfs_cmd_t *zc) -{ - nvlist_t *configs; - int error; - - if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) - return (EEXIST); - - error = put_nvlist(zc, configs); - - nvlist_free(configs); - - return (error); -} - -static int -zfs_ioc_pool_stats(zfs_cmd_t *zc) -{ - nvlist_t *config; - int error; - int ret = 0; - - error = spa_get_stats(zc->zc_name, &config, zc->zc_value, - sizeof (zc->zc_value)); - - if (config != NULL) { - ret = put_nvlist(zc, config); - nvlist_free(config); - - /* - * The config may be present even if 'error' is non-zero. - * In this case we return success, and preserve the real errno - * in 'zc_cookie'. - */ - zc->zc_cookie = error; - } else { - ret = error; - } - - return (ret); -} - -/* - * Try to import the given pool, returning pool stats as appropriate so that - * user land knows which devices are available and overall pool health. - */ -static int -zfs_ioc_pool_tryimport(zfs_cmd_t *zc) -{ - nvlist_t *tryconfig, *config; - int error; - - if ((error = get_nvlist(zc, &tryconfig)) != 0) - return (error); - - config = spa_tryimport(tryconfig); - - nvlist_free(tryconfig); - - if (config == NULL) - return (EINVAL); - - error = put_nvlist(zc, config); - nvlist_free(config); - - return (error); -} - -static int -zfs_ioc_pool_scrub(zfs_cmd_t *zc) -{ - spa_t *spa; - int error; - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) - return (error); - - error = spa_scrub(spa, zc->zc_cookie, B_FALSE); - - spa_close(spa, FTAG); - - return (error); -} - -static int -zfs_ioc_pool_freeze(zfs_cmd_t *zc) -{ - spa_t *spa; - int error; - - error = spa_open(zc->zc_name, &spa, FTAG); - if (error == 0) { - spa_freeze(spa); - spa_close(spa, FTAG); - } - return (error); -} - -static int -zfs_ioc_pool_upgrade(zfs_cmd_t *zc) -{ - spa_t *spa; - int error; - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) - return (error); - - spa_upgrade(spa); - - spa_close(spa, FTAG); - - return (error); -} - -static int -zfs_ioc_pool_get_history(zfs_cmd_t *zc) -{ - spa_t *spa; - char *hist_buf; - uint64_t size; - int error; - - if ((size = zc->zc_history_len) == 0) - return (EINVAL); - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) - return (error); - - if (spa_version(spa) < ZFS_VERSION_ZPOOL_HISTORY) { - spa_close(spa, FTAG); - return (ENOTSUP); - } - - hist_buf = kmem_alloc(size, KM_SLEEP); - if ((error = spa_history_get(spa, &zc->zc_history_offset, - &zc->zc_history_len, hist_buf)) == 0) { - error = xcopyout(hist_buf, (char *)(uintptr_t)zc->zc_history, - zc->zc_history_len); - } - - spa_close(spa, FTAG); - kmem_free(hist_buf, size); - return (error); -} - -static int -zfs_ioc_pool_log_history(zfs_cmd_t *zc) -{ - spa_t *spa; - char *history_str = NULL; - size_t size; - int error; - - size = zc->zc_history_len; - if (size == 0 || size > HIS_MAX_RECORD_LEN) - return (EINVAL); - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) - return (error); - - if (spa_version(spa) < ZFS_VERSION_ZPOOL_HISTORY) { - spa_close(spa, FTAG); - return (ENOTSUP); - } - - /* add one for the NULL delimiter */ - size++; - history_str = kmem_alloc(size, KM_SLEEP); - if ((error = xcopyin((void *)(uintptr_t)zc->zc_history, history_str, - size)) != 0) { - spa_close(spa, FTAG); - kmem_free(history_str, size); - return (error); - } - history_str[size - 1] = '\0'; - - error = spa_history_log(spa, history_str, zc->zc_history_offset); - - spa_close(spa, FTAG); - kmem_free(history_str, size); - - return (error); -} - -static int -zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc) -{ - int error; - - if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value)) - return (error); - - return (0); -} - -static int -zfs_ioc_obj_to_path(zfs_cmd_t *zc) -{ - objset_t *osp; - int error; - - if ((error = dmu_objset_open(zc->zc_name, DMU_OST_ZFS, - DS_MODE_NONE | DS_MODE_READONLY, &osp)) != 0) - return (error); - - error = zfs_obj_to_path(osp, zc->zc_obj, zc->zc_value, - sizeof (zc->zc_value)); - dmu_objset_close(osp); - - return (error); -} - -static int -zfs_ioc_vdev_add(zfs_cmd_t *zc) -{ - spa_t *spa; - int error; - nvlist_t *config; - - error = spa_open(zc->zc_name, &spa, FTAG); - if (error != 0) - return (error); - - /* - * A root pool with concatenated devices is not supported. - * Thus, can not add a device to a root pool with one device. - */ - if (spa->spa_root_vdev->vdev_children == 1 && spa->spa_bootfs != 0) { - spa_close(spa, FTAG); - return (EDOM); - } - - if ((error = get_nvlist(zc, &config)) == 0) { - error = spa_vdev_add(spa, config); - nvlist_free(config); - } - - spa_close(spa, FTAG); - return (error); -} - -static int -zfs_ioc_vdev_remove(zfs_cmd_t *zc) -{ - spa_t *spa; - int error; - - error = spa_open(zc->zc_name, &spa, FTAG); - if (error != 0) - return (error); - error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); - spa_close(spa, FTAG); - return (error); -} - -static int -zfs_ioc_vdev_online(zfs_cmd_t *zc) -{ - spa_t *spa; - int error; - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) - return (error); - error = vdev_online(spa, zc->zc_guid); - spa_close(spa, FTAG); - return (error); -} - -static int -zfs_ioc_vdev_offline(zfs_cmd_t *zc) -{ - spa_t *spa; - int istmp = zc->zc_cookie; - int error; - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) - return (error); - error = vdev_offline(spa, zc->zc_guid, istmp); - spa_close(spa, FTAG); - return (error); -} - -static int -zfs_ioc_vdev_attach(zfs_cmd_t *zc) -{ - spa_t *spa; - int replacing = zc->zc_cookie; - nvlist_t *config; - int error; - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) - return (error); - - if ((error = get_nvlist(zc, &config)) == 0) { - error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); - nvlist_free(config); - } - - spa_close(spa, FTAG); - return (error); -} - -static int -zfs_ioc_vdev_detach(zfs_cmd_t *zc) -{ - spa_t *spa; - int error; - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) - return (error); - - error = spa_vdev_detach(spa, zc->zc_guid, B_FALSE); - - spa_close(spa, FTAG); - return (error); -} - -static int -zfs_ioc_vdev_setpath(zfs_cmd_t *zc) -{ - spa_t *spa; - char *path = zc->zc_value; - uint64_t guid = zc->zc_guid; - int error; - - error = spa_open(zc->zc_name, &spa, FTAG); - if (error != 0) - return (error); - - error = spa_vdev_setpath(spa, guid, path); - spa_close(spa, FTAG); - return (error); -} - -static int -zfs_ioc_objset_stats(zfs_cmd_t *zc) -{ - objset_t *os = NULL; - int error; - nvlist_t *nv; - -retry: - error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, - DS_MODE_STANDARD | DS_MODE_READONLY, &os); - if (error != 0) { - /* - * This is ugly: dmu_objset_open() can return EBUSY if - * the objset is held exclusively. Fortunately this hold is - * only for a short while, so we retry here. - * This avoids user code having to handle EBUSY, - * for example for a "zfs list". - */ - if (error == EBUSY) { - delay(1); - goto retry; - } - return (error); - } - - dmu_objset_fast_stat(os, &zc->zc_objset_stats); - - if (zc->zc_nvlist_dst != 0 && - (error = dsl_prop_get_all(os, &nv)) == 0) { - dmu_objset_stats(os, nv); - /* - * NB: zvol_get_stats() will read the objset contents, - * which we aren't supposed to do with a - * DS_MODE_STANDARD open, because it could be - * inconsistent. So this is a bit of a workaround... - */ - if (!zc->zc_objset_stats.dds_inconsistent && - dmu_objset_type(os) == DMU_OST_ZVOL) - VERIFY(zvol_get_stats(os, nv) == 0); - error = put_nvlist(zc, nv); - nvlist_free(nv); - } - - spa_altroot(dmu_objset_spa(os), zc->zc_value, sizeof (zc->zc_value)); - - dmu_objset_close(os); - if (error == ENOMEM) - error = 0; - return (error); -} - -static int -zfs_ioc_dataset_list_next(zfs_cmd_t *zc) -{ - objset_t *os; - int error; - char *p; - -retry: - error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, - DS_MODE_STANDARD | DS_MODE_READONLY, &os); - if (error != 0) { - /* - * This is ugly: dmu_objset_open() can return EBUSY if - * the objset is held exclusively. Fortunately this hold is - * only for a short while, so we retry here. - * This avoids user code having to handle EBUSY, - * for example for a "zfs list". - */ - if (error == EBUSY) { - delay(1); - goto retry; - } - if (error == ENOENT) - error = ESRCH; - return (error); - } - - p = strrchr(zc->zc_name, '/'); - if (p == NULL || p[1] != '\0') - (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); - p = zc->zc_name + strlen(zc->zc_name); - - do { - error = dmu_dir_list_next(os, - sizeof (zc->zc_name) - (p - zc->zc_name), p, - NULL, &zc->zc_cookie); - if (error == ENOENT) - error = ESRCH; - } while (error == 0 && !INGLOBALZONE(curproc) && - !zone_dataset_visible(zc->zc_name, NULL)); - - /* - * If it's a hidden dataset (ie. with a '$' in its name), don't - * try to get stats for it. Userland will skip over it. - */ - if (error == 0 && strchr(zc->zc_name, '$') == NULL) - error = zfs_ioc_objset_stats(zc); /* fill in the stats */ - - dmu_objset_close(os); - return (error); -} - -static int -zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) -{ - objset_t *os; - int error; - -retry: - error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, - DS_MODE_STANDARD | DS_MODE_READONLY, &os); - if (error != 0) { - /* - * This is ugly: dmu_objset_open() can return EBUSY if - * the objset is held exclusively. Fortunately this hold is - * only for a short while, so we retry here. - * This avoids user code having to handle EBUSY, - * for example for a "zfs list". - */ - if (error == EBUSY) { - delay(1); - goto retry; - } - if (error == ENOENT) - error = ESRCH; - return (error); - } - - /* - * A dataset name of maximum length cannot have any snapshots, - * so exit immediately. - */ - if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) { - dmu_objset_close(os); - return (ESRCH); - } - - error = dmu_snapshot_list_next(os, - sizeof (zc->zc_name) - strlen(zc->zc_name), - zc->zc_name + strlen(zc->zc_name), NULL, &zc->zc_cookie); - if (error == ENOENT) - error = ESRCH; - - if (error == 0) - error = zfs_ioc_objset_stats(zc); /* fill in the stats */ - - dmu_objset_close(os); - return (error); -} - -static int -zfs_set_prop_nvlist(const char *name, dev_t dev, cred_t *cr, nvlist_t *nvl) -{ - nvpair_t *elem; - int error; - const char *propname; - zfs_prop_t prop; - uint64_t intval; - char *strval; - char buf[MAXNAMELEN]; - const char *p; - spa_t *spa; - - elem = NULL; - while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { - propname = nvpair_name(elem); - - if ((prop = zfs_name_to_prop(propname)) == - ZFS_PROP_INVAL) { - /* - * If this is a user-defined property, it must be a - * string, and there is no further validation to do. - */ - if (!zfs_prop_user(propname) || - nvpair_type(elem) != DATA_TYPE_STRING) - return (EINVAL); - - VERIFY(nvpair_value_string(elem, &strval) == 0); - error = dsl_prop_set(name, propname, 1, - strlen(strval) + 1, strval); - if (error == 0) - continue; - else - return (error); - } - - /* - * Check permissions for special properties. - */ - switch (prop) { - case ZFS_PROP_ZONED: - /* - * Disallow setting of 'zoned' from within a local zone. - */ - if (!INGLOBALZONE(curproc)) - return (EPERM); - break; - - case ZFS_PROP_QUOTA: - if (error = zfs_dozonecheck(name, cr)) - return (error); - - if (!INGLOBALZONE(curproc)) { - uint64_t zoned; - char setpoint[MAXNAMELEN]; - int dslen; - /* - * Unprivileged users are allowed to modify the - * quota on things *under* (ie. contained by) - * the thing they own. - */ - if (dsl_prop_get_integer(name, "jailed", &zoned, - setpoint)) - return (EPERM); - if (!zoned) /* this shouldn't happen */ - return (EPERM); - dslen = strlen(name); - if (dslen <= strlen(setpoint)) - return (EPERM); - } - break; - - case ZFS_PROP_COMPRESSION: - /* - * If the user specified gzip compression, make sure - * the SPA supports it. We ignore any errors here since - * we'll catch them later. - */ - if (nvpair_type(elem) == DATA_TYPE_UINT64 && - nvpair_value_uint64(elem, &intval) == 0 && - intval >= ZIO_COMPRESS_GZIP_1 && - intval <= ZIO_COMPRESS_GZIP_9) { - if ((p = strchr(name, '/')) == NULL) { - p = name; - } else { - bcopy(name, buf, p - name); - buf[p - name] = '\0'; - p = buf; - } - - if (spa_open(p, &spa, FTAG) == 0) { - if (spa_version(spa) < - ZFS_VERSION_GZIP_COMPRESSION) { - spa_close(spa, FTAG); - return (ENOTSUP); - } - - spa_close(spa, FTAG); - } - } - break; - } - - switch (prop) { - case ZFS_PROP_QUOTA: - if ((error = nvpair_value_uint64(elem, &intval)) != 0 || - (error = dsl_dir_set_quota(name, - intval)) != 0) - return (error); - break; - - case ZFS_PROP_RESERVATION: - if ((error = nvpair_value_uint64(elem, &intval)) != 0 || - (error = dsl_dir_set_reservation(name, - intval)) != 0) - return (error); - break; - - case ZFS_PROP_VOLSIZE: - if ((error = nvpair_value_uint64(elem, &intval)) != 0 || - (error = zvol_set_volsize(name, dev, - intval)) != 0) - return (error); - break; - - case ZFS_PROP_VOLBLOCKSIZE: - if ((error = nvpair_value_uint64(elem, &intval)) != 0 || - (error = zvol_set_volblocksize(name, - intval)) != 0) - return (error); - break; - - default: - if (nvpair_type(elem) == DATA_TYPE_STRING) { - if (zfs_prop_get_type(prop) != - prop_type_string) - return (EINVAL); - VERIFY(nvpair_value_string(elem, &strval) == 0); - if ((error = dsl_prop_set(name, - nvpair_name(elem), 1, strlen(strval) + 1, - strval)) != 0) - return (error); - } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { - const char *unused; - - VERIFY(nvpair_value_uint64(elem, &intval) == 0); - - switch (zfs_prop_get_type(prop)) { - case prop_type_number: - break; - case prop_type_boolean: - if (intval > 1) - return (EINVAL); - break; - case prop_type_string: - return (EINVAL); - case prop_type_index: - if (zfs_prop_index_to_string(prop, - intval, &unused) != 0) - return (EINVAL); - break; - default: - cmn_err(CE_PANIC, "unknown property " - "type"); - break; - } - - if ((error = dsl_prop_set(name, propname, - 8, 1, &intval)) != 0) - return (error); - } else { - return (EINVAL); - } - break; - } - } - - return (0); -} - -static int -zfs_ioc_set_prop(zfs_cmd_t *zc) -{ - nvlist_t *nvl; - int error; - zfs_prop_t prop; - - /* - * If zc_value is set, then this is an attempt to inherit a value. - * Otherwise, zc_nvlist refers to a list of properties to set. - */ - if (zc->zc_value[0] != '\0') { - if (!zfs_prop_user(zc->zc_value) && - ((prop = zfs_name_to_prop(zc->zc_value)) == - ZFS_PROP_INVAL || - !zfs_prop_inheritable(prop))) - return (EINVAL); - - return (dsl_prop_set(zc->zc_name, zc->zc_value, 0, 0, NULL)); - } - - if ((error = get_nvlist(zc, &nvl)) != 0) - return (error); - - error = zfs_set_prop_nvlist(zc->zc_name, zc->zc_dev, - (cred_t *)(uintptr_t)zc->zc_cred, nvl); - nvlist_free(nvl); - return (error); -} - -static int -zfs_ioc_pool_set_props(zfs_cmd_t *zc) -{ - nvlist_t *nvl; - int error, reset_bootfs = 0; - uint64_t objnum; - zpool_prop_t prop; - nvpair_t *elem; - char *propname, *strval; - spa_t *spa; - vdev_t *rvdev; - char *vdev_type; - objset_t *os; - - if ((error = get_nvlist(zc, &nvl)) != 0) - return (error); - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { - nvlist_free(nvl); - return (error); - } - - if (spa_version(spa) < ZFS_VERSION_BOOTFS) { - nvlist_free(nvl); - spa_close(spa, FTAG); - return (ENOTSUP); - } - - elem = NULL; - while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { - - propname = nvpair_name(elem); - - if ((prop = zpool_name_to_prop(propname)) == - ZFS_PROP_INVAL) { - nvlist_free(nvl); - spa_close(spa, FTAG); - return (EINVAL); - } - - switch (prop) { - case ZFS_PROP_BOOTFS: - /* - * A bootable filesystem can not be on a RAIDZ pool - * nor a striped pool with more than 1 device. - */ - rvdev = spa->spa_root_vdev; - vdev_type = - rvdev->vdev_child[0]->vdev_ops->vdev_op_type; - if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 || - (strcmp(vdev_type, VDEV_TYPE_MIRROR) != 0 && - rvdev->vdev_children > 1)) { - error = ENOTSUP; - break; - } - - reset_bootfs = 1; - - VERIFY(nvpair_value_string(elem, &strval) == 0); - if (strval == NULL || strval[0] == '\0') { - objnum = - zfs_prop_default_numeric(ZFS_PROP_BOOTFS); - break; - } - - if (error = dmu_objset_open(strval, DMU_OST_ZFS, - DS_MODE_STANDARD | DS_MODE_READONLY, &os)) - break; - objnum = dmu_objset_id(os); - dmu_objset_close(os); - break; - - default: - error = EINVAL; - } - - if (error) - break; - } - if (error == 0) { - if (reset_bootfs) { - VERIFY(nvlist_remove(nvl, - zpool_prop_to_name(ZFS_PROP_BOOTFS), - DATA_TYPE_STRING) == 0); - VERIFY(nvlist_add_uint64(nvl, - zpool_prop_to_name(ZFS_PROP_BOOTFS), objnum) == 0); - } - error = spa_set_props(spa, nvl); - } - - nvlist_free(nvl); - spa_close(spa, FTAG); - - return (error); -} - -static int -zfs_ioc_pool_get_props(zfs_cmd_t *zc) -{ - spa_t *spa; - int error; - nvlist_t *nvp = NULL; - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) - return (error); - - error = spa_get_props(spa, &nvp); - - if (error == 0 && zc->zc_nvlist_dst != 0) - error = put_nvlist(zc, nvp); - else - error = EFAULT; - - spa_close(spa, FTAG); - - if (nvp) - nvlist_free(nvp); - return (error); -} - -static int -zfs_ioc_create_minor(zfs_cmd_t *zc) -{ - return (zvol_create_minor(zc->zc_name, zc->zc_dev)); -} - -static int -zfs_ioc_remove_minor(zfs_cmd_t *zc) -{ - return (zvol_remove_minor(zc->zc_name)); -} - -/* - * Search the vfs list for a specified resource. Returns a pointer to it - * or NULL if no suitable entry is found. The caller of this routine - * is responsible for releasing the returned vfs pointer. - */ -static vfs_t * -zfs_get_vfs(const char *resource) -{ - vfs_t *vfsp; - - mtx_lock(&mountlist_mtx); - TAILQ_FOREACH(vfsp, &mountlist, mnt_list) { - if (strcmp(vfsp->mnt_stat.f_mntfromname, resource) == 0) { - VFS_HOLD(vfsp); - break; - } - } - mtx_unlock(&mountlist_mtx); - return (vfsp); -} - -static void -zfs_create_cb(objset_t *os, void *arg, dmu_tx_t *tx) -{ - zfs_create_data_t *zc = arg; - - zfs_create_fs(os, (cred_t *)(uintptr_t)zc->zc_cred, tx); -} - -static int -zfs_ioc_create(zfs_cmd_t *zc) -{ - objset_t *clone; - int error = 0; - zfs_create_data_t cbdata = { 0 }; - void (*cbfunc)(objset_t *os, void *arg, dmu_tx_t *tx); - dmu_objset_type_t type = zc->zc_objset_type; - - switch (type) { - - case DMU_OST_ZFS: - cbfunc = zfs_create_cb; - break; - - case DMU_OST_ZVOL: - cbfunc = zvol_create_cb; - break; - - default: - cbfunc = NULL; - } - if (strchr(zc->zc_name, '@')) - return (EINVAL); - - if (zc->zc_nvlist_src != 0 && - (error = get_nvlist(zc, &cbdata.zc_props)) != 0) - return (error); - - cbdata.zc_cred = (cred_t *)(uintptr_t)zc->zc_cred; - cbdata.zc_dev = (dev_t)zc->zc_dev; - - if (zc->zc_value[0] != '\0') { - /* - * We're creating a clone of an existing snapshot. - */ - zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; - if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) { - nvlist_free(cbdata.zc_props); - return (EINVAL); - } - - error = dmu_objset_open(zc->zc_value, type, - DS_MODE_STANDARD | DS_MODE_READONLY, &clone); - if (error) { - nvlist_free(cbdata.zc_props); - return (error); - } - error = dmu_objset_create(zc->zc_name, type, clone, NULL, NULL); - dmu_objset_close(clone); - } else { - if (cbfunc == NULL) { - nvlist_free(cbdata.zc_props); - return (EINVAL); - } - - if (type == DMU_OST_ZVOL) { - uint64_t volsize, volblocksize; - - if (cbdata.zc_props == NULL || - nvlist_lookup_uint64(cbdata.zc_props, - zfs_prop_to_name(ZFS_PROP_VOLSIZE), - &volsize) != 0) { - nvlist_free(cbdata.zc_props); - return (EINVAL); - } - - if ((error = nvlist_lookup_uint64(cbdata.zc_props, - zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), - &volblocksize)) != 0 && error != ENOENT) { - nvlist_free(cbdata.zc_props); - return (EINVAL); - } - - if (error != 0) - volblocksize = zfs_prop_default_numeric( - ZFS_PROP_VOLBLOCKSIZE); - - if ((error = zvol_check_volblocksize( - volblocksize)) != 0 || - (error = zvol_check_volsize(volsize, - volblocksize)) != 0) { - nvlist_free(cbdata.zc_props); - return (error); - } - } - - error = dmu_objset_create(zc->zc_name, type, NULL, cbfunc, - &cbdata); - } - - /* - * It would be nice to do this atomically. - */ - if (error == 0) { - if ((error = zfs_set_prop_nvlist(zc->zc_name, - zc->zc_dev, (cred_t *)(uintptr_t)zc->zc_cred, - cbdata.zc_props)) != 0) - (void) dmu_objset_destroy(zc->zc_name); - } - - nvlist_free(cbdata.zc_props); - return (error); -} - -static int -zfs_ioc_snapshot(zfs_cmd_t *zc) -{ - if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) - return (EINVAL); - return (dmu_objset_snapshot(zc->zc_name, - zc->zc_value, zc->zc_cookie)); -} - -int -zfs_unmount_snap(char *name, void *arg) -{ - char *snapname = arg; - char *cp; - vfs_t *vfsp = NULL; - - /* - * Snapshots (which are under .zfs control) must be unmounted - * before they can be destroyed. - */ - - if (snapname) { - (void) strcat(name, "@"); - (void) strcat(name, snapname); - vfsp = zfs_get_vfs(name); - cp = strchr(name, '@'); - *cp = '\0'; - } else if (strchr(name, '@')) { - vfsp = zfs_get_vfs(name); - } - - if (vfsp) { - /* - * Always force the unmount for snapshots. - */ - int flag = MS_FORCE; - int err; - - if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) { - VFS_RELE(vfsp); - return (err); - } - VFS_RELE(vfsp); - mtx_lock(&Giant); /* dounmount() */ - dounmount(vfsp, flag, curthread); - mtx_unlock(&Giant); /* dounmount() */ - } - return (0); -} - -static int -zfs_ioc_destroy_snaps(zfs_cmd_t *zc) -{ - int err; - - if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) - return (EINVAL); - err = dmu_objset_find(zc->zc_name, - zfs_unmount_snap, zc->zc_value, DS_FIND_CHILDREN); - if (err) - return (err); - return (dmu_snapshots_destroy(zc->zc_name, zc->zc_value)); -} - -static int -zfs_ioc_destroy(zfs_cmd_t *zc) -{ - if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) { - int err = zfs_unmount_snap(zc->zc_name, NULL); - if (err) - return (err); - } - - return (dmu_objset_destroy(zc->zc_name)); -} - -static int -zfs_ioc_rollback(zfs_cmd_t *zc) -{ - return (dmu_objset_rollback(zc->zc_name)); -} - -static int -zfs_ioc_rename(zfs_cmd_t *zc) -{ - int recursive = zc->zc_cookie & 1; - - zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; - if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) - return (EINVAL); - - /* - * Unmount snapshot unless we're doing a recursive rename, - * in which case the dataset code figures out which snapshots - * to unmount. - */ - if (!recursive && strchr(zc->zc_name, '@') != NULL && - zc->zc_objset_type == DMU_OST_ZFS) { - int err = zfs_unmount_snap(zc->zc_name, NULL); - if (err) - return (err); - } - - return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive)); -} - -static int -zfs_ioc_recvbackup(zfs_cmd_t *zc) -{ - kthread_t *td = curthread; - struct file *fp; - int error; - offset_t new_off; - - if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || - strchr(zc->zc_value, '@') == NULL) - return (EINVAL); - - error = fget_read(td, zc->zc_cookie, &fp); - if (error) - return (error); - - error = dmu_recvbackup(zc->zc_value, &zc->zc_begin_record, - &zc->zc_cookie, (boolean_t)zc->zc_guid, fp, - fp->f_offset); - - new_off = fp->f_offset + zc->zc_cookie; - fp->f_offset = new_off; - - fdrop(fp, td); - return (error); -} - -static int -zfs_ioc_sendbackup(zfs_cmd_t *zc) -{ - kthread_t *td = curthread; - struct file *fp; - objset_t *fromsnap = NULL; - objset_t *tosnap; - int error, fd; - - error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, - DS_MODE_STANDARD | DS_MODE_READONLY, &tosnap); - if (error) - return (error); - - if (zc->zc_value[0] != '\0') { - char buf[MAXPATHLEN]; - char *cp; - - (void) strncpy(buf, zc->zc_name, sizeof (buf)); - cp = strchr(buf, '@'); - if (cp) - *(cp+1) = 0; - (void) strlcat(buf, zc->zc_value, sizeof (buf)); - error = dmu_objset_open(buf, DMU_OST_ANY, - DS_MODE_STANDARD | DS_MODE_READONLY, &fromsnap); - if (error) { - dmu_objset_close(tosnap); - return (error); - } - } - - fd = zc->zc_cookie; - error = fget_write(td, fd, &fp); - if (error) { - dmu_objset_close(tosnap); - if (fromsnap) - dmu_objset_close(fromsnap); - return (error); - } - - error = dmu_sendbackup(tosnap, fromsnap, fp); - - fdrop(fp, td); - if (fromsnap) - dmu_objset_close(fromsnap); - dmu_objset_close(tosnap); - return (error); -} - -static int -zfs_ioc_inject_fault(zfs_cmd_t *zc) -{ - int id, error; - - error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, - &zc->zc_inject_record); - - if (error == 0) - zc->zc_guid = (uint64_t)id; - - return (error); -} - -static int -zfs_ioc_clear_fault(zfs_cmd_t *zc) -{ - return (zio_clear_fault((int)zc->zc_guid)); -} - -static int -zfs_ioc_inject_list_next(zfs_cmd_t *zc) -{ - int id = (int)zc->zc_guid; - int error; - - error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), - &zc->zc_inject_record); - - zc->zc_guid = id; - - return (error); -} - -static int -zfs_ioc_error_log(zfs_cmd_t *zc) -{ - spa_t *spa; - int error; - size_t count = (size_t)zc->zc_nvlist_dst_size; - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) - return (error); - - error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, - &count); - if (error == 0) - zc->zc_nvlist_dst_size = count; - else - zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); - - spa_close(spa, FTAG); - - return (error); -} - -static int -zfs_ioc_clear(zfs_cmd_t *zc) -{ - spa_t *spa; - vdev_t *vd; - int error; - - if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) - return (error); - - spa_config_enter(spa, RW_WRITER, FTAG); - - if (zc->zc_guid == 0) { - vd = NULL; - } else if ((vd = spa_lookup_by_guid(spa, zc->zc_guid)) == NULL) { - spa_config_exit(spa, FTAG); - spa_close(spa, FTAG); - return (ENODEV); - } - - vdev_clear(spa, vd); - - spa_config_exit(spa, FTAG); - - spa_close(spa, FTAG); - - return (0); -} - -static int -zfs_ioc_promote(zfs_cmd_t *zc) -{ - char *cp; - - /* - * We don't need to unmount *all* the origin fs's snapshots, but - * it's easier. - */ - cp = strchr(zc->zc_value, '@'); - if (cp) - *cp = '\0'; - (void) dmu_objset_find(zc->zc_value, - zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS); - return (dsl_dataset_promote(zc->zc_name)); -} - -static int -zfs_ioc_jail(zfs_cmd_t *zc) -{ - - return (zone_dataset_attach((cred_t *)(uintptr_t)zc->zc_cred, - zc->zc_name, (int)zc->zc_jailid)); -} - -static int -zfs_ioc_unjail(zfs_cmd_t *zc) -{ - - return (zone_dataset_detach((cred_t *)(uintptr_t)zc->zc_cred, - zc->zc_name, (int)zc->zc_jailid)); -} - -static zfs_ioc_vec_t zfs_ioc_vec[] = { - { zfs_ioc_pool_create, zfs_secpolicy_config, pool_name }, - { zfs_ioc_pool_destroy, zfs_secpolicy_config, pool_name }, - { zfs_ioc_pool_import, zfs_secpolicy_config, pool_name }, - { zfs_ioc_pool_export, zfs_secpolicy_config, pool_name }, - { zfs_ioc_pool_configs, zfs_secpolicy_none, no_name }, - { zfs_ioc_pool_stats, zfs_secpolicy_read, pool_name }, - { zfs_ioc_pool_tryimport, zfs_secpolicy_config, no_name }, - { zfs_ioc_pool_scrub, zfs_secpolicy_config, pool_name }, - { zfs_ioc_pool_freeze, zfs_secpolicy_config, no_name }, - { zfs_ioc_pool_upgrade, zfs_secpolicy_config, pool_name }, - { zfs_ioc_pool_get_history, zfs_secpolicy_config, pool_name }, - { zfs_ioc_pool_log_history, zfs_secpolicy_config, pool_name }, - { zfs_ioc_vdev_add, zfs_secpolicy_config, pool_name }, - { zfs_ioc_vdev_remove, zfs_secpolicy_config, pool_name }, - { zfs_ioc_vdev_online, zfs_secpolicy_config, pool_name }, - { zfs_ioc_vdev_offline, zfs_secpolicy_config, pool_name }, - { zfs_ioc_vdev_attach, zfs_secpolicy_config, pool_name }, - { zfs_ioc_vdev_detach, zfs_secpolicy_config, pool_name }, - { zfs_ioc_vdev_setpath, zfs_secpolicy_config, pool_name }, - { zfs_ioc_objset_stats, zfs_secpolicy_read, dataset_name }, - { zfs_ioc_dataset_list_next, zfs_secpolicy_read, dataset_name }, - { zfs_ioc_snapshot_list_next, zfs_secpolicy_read, dataset_name }, - { zfs_ioc_set_prop, zfs_secpolicy_write, dataset_name }, - { zfs_ioc_create_minor, zfs_secpolicy_config, dataset_name }, - { zfs_ioc_remove_minor, zfs_secpolicy_config, dataset_name }, - { zfs_ioc_create, zfs_secpolicy_parent, dataset_name }, - { zfs_ioc_destroy, zfs_secpolicy_parent, dataset_name }, - { zfs_ioc_rollback, zfs_secpolicy_write, dataset_name }, - { zfs_ioc_rename, zfs_secpolicy_write, dataset_name }, - { zfs_ioc_recvbackup, zfs_secpolicy_write, dataset_name }, - { zfs_ioc_sendbackup, zfs_secpolicy_operator, dataset_name }, - { zfs_ioc_inject_fault, zfs_secpolicy_inject, no_name }, - { zfs_ioc_clear_fault, zfs_secpolicy_inject, no_name }, - { zfs_ioc_inject_list_next, zfs_secpolicy_inject, no_name }, - { zfs_ioc_error_log, zfs_secpolicy_inject, pool_name }, - { zfs_ioc_clear, zfs_secpolicy_config, pool_name }, - { zfs_ioc_promote, zfs_secpolicy_write, dataset_name }, - { zfs_ioc_destroy_snaps, zfs_secpolicy_write, dataset_name }, - { zfs_ioc_snapshot, zfs_secpolicy_operator, dataset_name }, - { zfs_ioc_dsobj_to_dsname, zfs_secpolicy_config, pool_name }, - { zfs_ioc_obj_to_path, zfs_secpolicy_config, no_name }, - { zfs_ioc_pool_set_props, zfs_secpolicy_config, pool_name }, - { zfs_ioc_pool_get_props, zfs_secpolicy_read, pool_name }, - { zfs_ioc_jail, zfs_secpolicy_config, dataset_name }, - { zfs_ioc_unjail, zfs_secpolicy_config, dataset_name } -}; - -static int -zfsdev_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, - struct thread *td) -{ - zfs_cmd_t *zc = (void *)addr; - uint_t vec; - int error; - - vec = ZFS_IOC(cmd); - - if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) - return (EINVAL); - - zc->zc_cred = (uintptr_t)td->td_ucred; - zc->zc_dev = (uintptr_t)dev; - error = zfs_ioc_vec[vec].zvec_secpolicy(zc->zc_name, td->td_ucred); - - /* - * Ensure that all pool/dataset names are valid before we pass down to - * the lower layers. - */ - if (error == 0) { - zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; - switch (zfs_ioc_vec[vec].zvec_namecheck) { - case pool_name: - if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) - error = EINVAL; - break; - - case dataset_name: - if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) - error = EINVAL; - break; - - case no_name: - break; - } - } - - if (error == 0) - error = zfs_ioc_vec[vec].zvec_func(zc); - - return (error); -} - -/* - * OK, so this is a little weird. - * - * /dev/zfs is the control node, i.e. minor 0. - * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. - * - * /dev/zfs has basically nothing to do except serve up ioctls, - * so most of the standard driver entry points are in zvol.c. - */ -static struct cdevsw zfs_cdevsw = { - .d_version = D_VERSION, - .d_ioctl = zfsdev_ioctl, - .d_name = ZFS_DEV_NAME -}; - -static void -zfsdev_init(void) -{ - zfsdev = make_dev(&zfs_cdevsw, 0x0, UID_ROOT, GID_OPERATOR, 0660, - ZFS_DEV_NAME); -} - -static void -zfsdev_fini(void) -{ - if (zfsdev != NULL) - destroy_dev(zfsdev); -} - -static struct task zfs_start_task; -static struct root_hold_token *zfs_root_token; - -static void -zfs_start(void *context __unused, int pending __unused) -{ - - zfsdev_init(); - spa_init(FREAD | FWRITE); - zfs_init(); - zvol_init(); - printf("ZFS storage pool version " ZFS_VERSION_STRING "\n"); - root_mount_rel(zfs_root_token); -} - -static int -zfs_modevent(module_t mod, int type, void *unused __unused) -{ - int error; - - error = EOPNOTSUPP; - switch (type) { - case MOD_LOAD: - zfs_root_token = root_mount_hold("ZFS"); - printf("WARNING: ZFS is considered to be an experimental " - "feature in FreeBSD.\n"); - TASK_INIT(&zfs_start_task, 0, zfs_start, NULL); - taskqueue_enqueue(taskqueue_thread, &zfs_start_task); - error = 0; - break; - case MOD_UNLOAD: - if (spa_busy() || zfs_busy() || zvol_busy() || - zio_injection_enabled) { - error = EBUSY; - break; - } - zvol_fini(); - zfs_fini(); - spa_fini(); - zfsdev_fini(); - error = 0; - break; - } - return (error); -} - -static moduledata_t zfs_mod = { - "zfsctrl", - zfs_modevent, - 0 -}; -DECLARE_MODULE(zfsctrl, zfs_mod, SI_SUB_VFS, SI_ORDER_ANY); |
