diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c | 1811 |
1 files changed, 1811 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c new file mode 100644 index 0000000..aac1bb1 --- /dev/null +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c @@ -0,0 +1,1811 @@ +/* + * 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/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/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/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_props_set(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_props_get(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)); +} + +static 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) +{ + zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; + if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) + return (EINVAL); + + if (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)); +} + +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_props_set, zfs_secpolicy_config, pool_name }, + { zfs_ioc_pool_props_get, 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 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"); +} + +static int +zfs_modevent(module_t mod, int type, void *unused __unused) +{ + int error; + + error = EOPNOTSUPP; + switch (type) { + case MOD_LOAD: + 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_MOUNT_ROOT, SI_ORDER_ANY); |
