diff options
Diffstat (limited to 'module/zfs/zfs_ioctl.c')
| -rw-r--r-- | module/zfs/zfs_ioctl.c | 3175 |
1 files changed, 3175 insertions, 0 deletions
diff --git a/module/zfs/zfs_ioctl.c b/module/zfs/zfs_ioctl.c new file mode 100644 index 000000000..b6ad57451 --- /dev/null +++ b/module/zfs/zfs_ioctl.c @@ -0,0 +1,3175 @@ +/* + * 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 2008 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#include <sys/types.h> +#include <sys/param.h> +#include <sys/errno.h> +#include <sys/uio.h> +#include <sys/buf.h> +#include <sys/modctl.h> +#include <sys/open.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/zfs_znode.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/dsl_deleg.h> +#include <sys/dmu_objset.h> +#include <sys/ddi.h> +#include <sys/sunddi.h> +#include <sys/sunldi.h> +#include <sys/policy.h> +#include <sys/zone.h> +#include <sys/nvpair.h> +#include <sys/pathname.h> +#include <sys/mount.h> +#include <sys/sdt.h> +#include <sys/fs/zfs.h> +#include <sys/zfs_ctldir.h> +#include <sys/zfs_dir.h> +#include <sys/zvol.h> +#include <sharefs/share.h> +#include <sys/dmu_objset.h> + +#include "zfs_namecheck.h" +#include "zfs_prop.h" +#include "zfs_deleg.h" + +extern struct modlfs zfs_modlfs; + +extern void zfs_init(void); +extern void zfs_fini(void); + +ldi_ident_t zfs_li = NULL; +dev_info_t *zfs_dip; + +typedef int zfs_ioc_func_t(zfs_cmd_t *); +typedef int zfs_secpolicy_func_t(zfs_cmd_t *, 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; + boolean_t zvec_his_log; +} zfs_ioc_vec_t; + +static void clear_props(char *dataset, nvlist_t *props); +static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *, + boolean_t *); +int zfs_set_prop_nvlist(const char *, nvlist_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); +} + +static void +history_str_free(char *buf) +{ + kmem_free(buf, HIS_MAX_RECORD_LEN); +} + +static char * +history_str_get(zfs_cmd_t *zc) +{ + char *buf; + + if (zc->zc_history == NULL) + return (NULL); + + buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP); + if (copyinstr((void *)(uintptr_t)zc->zc_history, + buf, HIS_MAX_RECORD_LEN, NULL) != 0) { + history_str_free(buf); + return (NULL); + } + + buf[HIS_MAX_RECORD_LEN -1] = '\0'; + + return (buf); +} + +/* + * Check to see if the named dataset is currently defined as bootable + */ +static boolean_t +zfs_is_bootfs(const char *name) +{ + spa_t *spa; + boolean_t ret = B_FALSE; + + if (spa_open(name, &spa, FTAG) == 0) { + if (spa->spa_bootfs) { + objset_t *os; + + if (dmu_objset_open(name, DMU_OST_ZFS, + DS_MODE_USER | DS_MODE_READONLY, &os) == 0) { + ret = (dmu_objset_id(os) == spa->spa_bootfs); + dmu_objset_close(os); + } + } + spa_close(spa, FTAG); + } + return (ret); +} + +/* + * zfs_earlier_version + * + * Return non-zero if the spa version is less than requested version. + */ +static int +zfs_earlier_version(const char *name, int version) +{ + spa_t *spa; + + if (spa_open(name, &spa, FTAG) == 0) { + if (spa_version(spa) < version) { + spa_close(spa, FTAG); + return (1); + } + spa_close(spa, FTAG); + } + return (0); +} + +/* + * zpl_earlier_version + * + * Return TRUE if the ZPL version is less than requested version. + */ +static boolean_t +zpl_earlier_version(const char *name, int version) +{ + objset_t *os; + boolean_t rc = B_TRUE; + + if (dmu_objset_open(name, DMU_OST_ANY, + DS_MODE_USER | DS_MODE_READONLY, &os) == 0) { + uint64_t zplversion; + + if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0) + rc = zplversion < version; + dmu_objset_close(os); + } + return (rc); +} + +static void +zfs_log_history(zfs_cmd_t *zc) +{ + spa_t *spa; + char *buf; + + if ((buf = history_str_get(zc)) == NULL) + return; + + if (spa_open(zc->zc_name, &spa, FTAG) == 0) { + if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY) + (void) spa_history_log(spa, buf, LOG_CMD_NORMAL); + spa_close(spa, FTAG); + } + history_str_free(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(zfs_cmd_t *zc, 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(zfs_cmd_t *zc, cred_t *cr) +{ + if (INGLOBALZONE(curproc) || + zone_dataset_visible(zc->zc_name, 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, "zoned", &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); +} + +int +zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr) +{ + int error; + + error = zfs_dozonecheck(name, cr); + if (error == 0) { + error = secpolicy_zfs(cr); + if (error) + error = dsl_deleg_access(name, perm, cr); + } + return (error); +} + +static int +zfs_secpolicy_setprop(const char *name, zfs_prop_t prop, cred_t *cr) +{ + /* + * 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 (!INGLOBALZONE(curproc)) { + uint64_t zoned; + char setpoint[MAXNAMELEN]; + /* + * Unprivileged users are allowed to modify the + * quota on things *under* (ie. contained by) + * the thing they own. + */ + if (dsl_prop_get_integer(name, "zoned", &zoned, + setpoint)) + return (EPERM); + if (!zoned || strlen(name) <= strlen(setpoint)) + return (EPERM); + } + break; + } + + return (zfs_secpolicy_write_perms(name, zfs_prop_to_name(prop), cr)); +} + +int +zfs_secpolicy_fsacl(zfs_cmd_t *zc, cred_t *cr) +{ + int error; + + error = zfs_dozonecheck(zc->zc_name, cr); + if (error) + return (error); + + /* + * permission to set permissions will be evaluated later in + * dsl_deleg_can_allow() + */ + return (0); +} + +int +zfs_secpolicy_rollback(zfs_cmd_t *zc, cred_t *cr) +{ + int error; + error = zfs_secpolicy_write_perms(zc->zc_name, + ZFS_DELEG_PERM_ROLLBACK, cr); + if (error == 0) + error = zfs_secpolicy_write_perms(zc->zc_name, + ZFS_DELEG_PERM_MOUNT, cr); + return (error); +} + +int +zfs_secpolicy_send(zfs_cmd_t *zc, cred_t *cr) +{ + return (zfs_secpolicy_write_perms(zc->zc_name, + ZFS_DELEG_PERM_SEND, cr)); +} + +int +zfs_secpolicy_share(zfs_cmd_t *zc, cred_t *cr) +{ + if (!INGLOBALZONE(curproc)) + return (EPERM); + + if (secpolicy_nfs(cr) == 0) { + return (0); + } else { + vnode_t *vp; + int error; + + if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, + NO_FOLLOW, NULL, &vp)) != 0) + return (error); + + /* Now make sure mntpnt and dataset are ZFS */ + + if (vp->v_vfsp->vfs_fstype != zfsfstype || + (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), + zc->zc_name) != 0)) { + VN_RELE(vp); + return (EPERM); + } + + VN_RELE(vp); + return (dsl_deleg_access(zc->zc_name, + ZFS_DELEG_PERM_SHARE, cr)); + } +} + +static int +zfs_get_parent(const char *datasetname, char *parent, int parentsize) +{ + char *cp; + + /* + * Remove the @bla or /bla from the end of the name to get the parent. + */ + (void) strncpy(parent, datasetname, parentsize); + cp = strrchr(parent, '@'); + if (cp != NULL) { + cp[0] = '\0'; + } else { + cp = strrchr(parent, '/'); + if (cp == NULL) + return (ENOENT); + cp[0] = '\0'; + } + + return (0); +} + +int +zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) +{ + int error; + + if ((error = zfs_secpolicy_write_perms(name, + ZFS_DELEG_PERM_MOUNT, cr)) != 0) + return (error); + + return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr)); +} + +static int +zfs_secpolicy_destroy(zfs_cmd_t *zc, cred_t *cr) +{ + return (zfs_secpolicy_destroy_perms(zc->zc_name, cr)); +} + +/* + * Must have sys_config privilege to check the iscsi permission + */ +/* ARGSUSED */ +static int +zfs_secpolicy_iscsi(zfs_cmd_t *zc, cred_t *cr) +{ + return (secpolicy_zfs(cr)); +} + +int +zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) +{ + char parentname[MAXNAMELEN]; + int error; + + if ((error = zfs_secpolicy_write_perms(from, + ZFS_DELEG_PERM_RENAME, cr)) != 0) + return (error); + + if ((error = zfs_secpolicy_write_perms(from, + ZFS_DELEG_PERM_MOUNT, cr)) != 0) + return (error); + + if ((error = zfs_get_parent(to, parentname, + sizeof (parentname))) != 0) + return (error); + + if ((error = zfs_secpolicy_write_perms(parentname, + ZFS_DELEG_PERM_CREATE, cr)) != 0) + return (error); + + if ((error = zfs_secpolicy_write_perms(parentname, + ZFS_DELEG_PERM_MOUNT, cr)) != 0) + return (error); + + return (error); +} + +static int +zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr) +{ + return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr)); +} + +static int +zfs_secpolicy_promote(zfs_cmd_t *zc, cred_t *cr) +{ + char parentname[MAXNAMELEN]; + objset_t *clone; + int error; + + error = zfs_secpolicy_write_perms(zc->zc_name, + ZFS_DELEG_PERM_PROMOTE, cr); + if (error) + return (error); + + error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, + DS_MODE_USER | DS_MODE_READONLY, &clone); + + if (error == 0) { + dsl_dataset_t *pclone = NULL; + dsl_dir_t *dd; + dd = clone->os->os_dsl_dataset->ds_dir; + + rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); + error = dsl_dataset_hold_obj(dd->dd_pool, + dd->dd_phys->dd_origin_obj, FTAG, &pclone); + rw_exit(&dd->dd_pool->dp_config_rwlock); + if (error) { + dmu_objset_close(clone); + return (error); + } + + error = zfs_secpolicy_write_perms(zc->zc_name, + ZFS_DELEG_PERM_MOUNT, cr); + + dsl_dataset_name(pclone, parentname); + dmu_objset_close(clone); + dsl_dataset_rele(pclone, FTAG); + if (error == 0) + error = zfs_secpolicy_write_perms(parentname, + ZFS_DELEG_PERM_PROMOTE, cr); + } + return (error); +} + +static int +zfs_secpolicy_receive(zfs_cmd_t *zc, cred_t *cr) +{ + int error; + + if ((error = zfs_secpolicy_write_perms(zc->zc_name, + ZFS_DELEG_PERM_RECEIVE, cr)) != 0) + return (error); + + if ((error = zfs_secpolicy_write_perms(zc->zc_name, + ZFS_DELEG_PERM_MOUNT, cr)) != 0) + return (error); + + return (zfs_secpolicy_write_perms(zc->zc_name, + ZFS_DELEG_PERM_CREATE, cr)); +} + +int +zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) +{ + int error; + + if ((error = zfs_secpolicy_write_perms(name, + ZFS_DELEG_PERM_SNAPSHOT, cr)) != 0) + return (error); + + error = zfs_secpolicy_write_perms(name, + ZFS_DELEG_PERM_MOUNT, cr); + + return (error); +} + +static int +zfs_secpolicy_snapshot(zfs_cmd_t *zc, cred_t *cr) +{ + + return (zfs_secpolicy_snapshot_perms(zc->zc_name, cr)); +} + +static int +zfs_secpolicy_create(zfs_cmd_t *zc, cred_t *cr) +{ + char parentname[MAXNAMELEN]; + int error; + + if ((error = zfs_get_parent(zc->zc_name, parentname, + sizeof (parentname))) != 0) + return (error); + + if (zc->zc_value[0] != '\0') { + if ((error = zfs_secpolicy_write_perms(zc->zc_value, + ZFS_DELEG_PERM_CLONE, cr)) != 0) + return (error); + } + + if ((error = zfs_secpolicy_write_perms(parentname, + ZFS_DELEG_PERM_CREATE, cr)) != 0) + return (error); + + error = zfs_secpolicy_write_perms(parentname, + ZFS_DELEG_PERM_MOUNT, cr); + + return (error); +} + +static int +zfs_secpolicy_umount(zfs_cmd_t *zc, cred_t *cr) +{ + int error; + + error = secpolicy_fs_unmount(cr, NULL); + if (error) { + error = dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr); + } + return (error); +} + +/* + * 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(zfs_cmd_t *zc, cred_t *cr) +{ + if (secpolicy_sys_config(cr, B_FALSE) != 0) + return (EPERM); + + return (0); +} + +/* + * Just like zfs_secpolicy_config, except that we will check for + * mount permission on the dataset for permission to create/remove + * the minor nodes. + */ +static int +zfs_secpolicy_minor(zfs_cmd_t *zc, cred_t *cr) +{ + if (secpolicy_sys_config(cr, B_FALSE) != 0) { + return (dsl_deleg_access(zc->zc_name, + ZFS_DELEG_PERM_MOUNT, cr)); + } + + return (0); +} + +/* + * Policy for fault injection. Requires all privileges. + */ +/* ARGSUSED */ +static int +zfs_secpolicy_inject(zfs_cmd_t *zc, cred_t *cr) +{ + return (secpolicy_zinject(cr)); +} + +static int +zfs_secpolicy_inherit(zfs_cmd_t *zc, cred_t *cr) +{ + zfs_prop_t prop = zfs_name_to_prop(zc->zc_value); + + if (prop == ZPROP_INVAL) { + if (!zfs_prop_user(zc->zc_value)) + return (EINVAL); + return (zfs_secpolicy_write_perms(zc->zc_name, + ZFS_DELEG_PERM_USERPROP, cr)); + } else { + if (!zfs_prop_inheritable(prop)) + return (EINVAL); + return (zfs_secpolicy_setprop(zc->zc_name, prop, cr)); + } +} + +/* + * Returns the nvlist as specified by the user in the zfs_cmd_t. + */ +static int +get_nvlist(uint64_t nvl, uint64_t size, nvlist_t **nvp) +{ + char *packed; + int error; + nvlist_t *list = NULL; + + /* + * Read in and unpack the user-supplied nvlist. + */ + if (size == 0) + return (EINVAL); + + packed = kmem_alloc(size, KM_SLEEP); + + if ((error = xcopyin((void *)(uintptr_t)nvl, packed, size)) != 0) { + kmem_free(packed, size); + return (error); + } + + if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) { + kmem_free(packed, size); + return (error); + } + + kmem_free(packed, size); + + *nvp = list; + 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) { + error = ENOMEM; + } else { + packed = kmem_alloc(size, KM_SLEEP); + 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, *props = NULL; + nvlist_t *rootprops = NULL; + nvlist_t *zplprops = NULL; + char *buf; + + if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, + &config)) + return (error); + + if (zc->zc_nvlist_src_size != 0 && (error = + get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, &props))) { + nvlist_free(config); + return (error); + } + + if (props) { + nvlist_t *nvl = NULL; + uint64_t version = SPA_VERSION; + + (void) nvlist_lookup_uint64(props, + zpool_prop_to_name(ZPOOL_PROP_VERSION), &version); + if (version < SPA_VERSION_INITIAL || version > SPA_VERSION) { + error = EINVAL; + goto pool_props_bad; + } + (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl); + if (nvl) { + error = nvlist_dup(nvl, &rootprops, KM_SLEEP); + if (error != 0) { + nvlist_free(config); + nvlist_free(props); + return (error); + } + (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS); + } + VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); + error = zfs_fill_zplprops_root(version, rootprops, + zplprops, NULL); + if (error) + goto pool_props_bad; + } + + buf = history_str_get(zc); + + error = spa_create(zc->zc_name, config, props, buf, zplprops); + + /* + * Set the remaining root properties + */ + if (!error && + (error = zfs_set_prop_nvlist(zc->zc_name, rootprops)) != 0) + (void) spa_destroy(zc->zc_name); + + if (buf != NULL) + history_str_free(buf); + +pool_props_bad: + nvlist_free(rootprops); + nvlist_free(zplprops); + nvlist_free(config); + nvlist_free(props); + + return (error); +} + +static int +zfs_ioc_pool_destroy(zfs_cmd_t *zc) +{ + int error; + zfs_log_history(zc); + error = spa_destroy(zc->zc_name); + return (error); +} + +static int +zfs_ioc_pool_import(zfs_cmd_t *zc) +{ + int error; + nvlist_t *config, *props = NULL; + uint64_t guid; + + if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, + &config)) != 0) + return (error); + + if (zc->zc_nvlist_src_size != 0 && (error = + get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, &props))) { + nvlist_free(config); + return (error); + } + + if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || + guid != zc->zc_guid) + error = EINVAL; + else if (zc->zc_cookie) + error = spa_import_faulted(zc->zc_name, config, + props); + else + error = spa_import(zc->zc_name, config, props); + + nvlist_free(config); + + if (props) + nvlist_free(props); + + return (error); +} + +static int +zfs_ioc_pool_export(zfs_cmd_t *zc) +{ + int error; + boolean_t force = (boolean_t)zc->zc_cookie; + + zfs_log_history(zc); + error = spa_export(zc->zc_name, NULL, force); + return (error); +} + +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->zc_nvlist_conf, zc->zc_nvlist_conf_size, + &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); + + 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); + + if (zc->zc_cookie < spa_version(spa) || zc->zc_cookie > SPA_VERSION) { + spa_close(spa, FTAG); + return (EINVAL); + } + + spa_upgrade(spa, zc->zc_cookie); + 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) < SPA_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_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_USER | 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, **l2cache, **spares; + uint_t nl2cache = 0, nspares = 0; + + error = spa_open(zc->zc_name, &spa, FTAG); + if (error != 0) + return (error); + + error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, + &config); + (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE, + &l2cache, &nl2cache); + + (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES, + &spares, &nspares); + + /* + * A root pool with concatenated devices is not supported. + * Thus, can not add a device to a root pool. + * + * Intent log device can not be added to a rootpool because + * during mountroot, zil is replayed, a seperated log device + * can not be accessed during the mountroot time. + * + * l2cache and spare devices are ok to be added to a rootpool. + */ + if (spa->spa_bootfs != 0 && nl2cache == 0 && nspares == 0) { + spa_close(spa, FTAG); + return (EDOM); + } + + if (error == 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_set_state(zfs_cmd_t *zc) +{ + spa_t *spa; + int error; + vdev_state_t newstate = VDEV_STATE_UNKNOWN; + + if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) + return (error); + switch (zc->zc_cookie) { + case VDEV_STATE_ONLINE: + error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate); + break; + + case VDEV_STATE_OFFLINE: + error = vdev_offline(spa, zc->zc_guid, zc->zc_obj); + break; + + case VDEV_STATE_FAULTED: + error = vdev_fault(spa, zc->zc_guid); + break; + + case VDEV_STATE_DEGRADED: + error = vdev_degrade(spa, zc->zc_guid); + break; + + default: + error = EINVAL; + } + zc->zc_cookie = newstate; + 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->zc_nvlist_conf, zc->zc_nvlist_conf_size, + &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); +} + +/* + * inputs: + * zc_name name of filesystem + * zc_nvlist_dst_size size of buffer for property nvlist + * + * outputs: + * zc_objset_stats stats + * zc_nvlist_dst property nvlist + * zc_nvlist_dst_size size of property nvlist + */ +static int +zfs_ioc_objset_stats(zfs_cmd_t *zc) +{ + objset_t *os = NULL; + int error; + nvlist_t *nv; + + if (error = dmu_objset_open(zc->zc_name, + DMU_OST_ANY, DS_MODE_USER | DS_MODE_READONLY, &os)) + return (error); + + dmu_objset_fast_stat(os, &zc->zc_objset_stats); + + if (zc->zc_nvlist_dst != 0 && + (error = dsl_prop_get_all(os, &nv, FALSE)) == 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_USER hold, because it could be + * inconsistent. So this is a bit of a workaround... + */ + if (!zc->zc_objset_stats.dds_inconsistent) { + if (dmu_objset_type(os) == DMU_OST_ZVOL) + VERIFY(zvol_get_stats(os, nv) == 0); + } + error = put_nvlist(zc, nv); + nvlist_free(nv); + } + + dmu_objset_close(os); + return (error); +} + +static int +nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop) +{ + uint64_t value; + int error; + + /* + * zfs_get_zplprop() will either find a value or give us + * the default value (if there is one). + */ + if ((error = zfs_get_zplprop(os, prop, &value)) != 0) + return (error); + VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0); + return (0); +} + +/* + * inputs: + * zc_name name of filesystem + * zc_nvlist_dst_size size of buffer for zpl property nvlist + * + * outputs: + * zc_nvlist_dst zpl property nvlist + * zc_nvlist_dst_size size of zpl property nvlist + */ +static int +zfs_ioc_objset_zplprops(zfs_cmd_t *zc) +{ + objset_t *os; + int err; + + if (err = dmu_objset_open(zc->zc_name, + DMU_OST_ANY, DS_MODE_USER | DS_MODE_READONLY, &os)) + return (err); + + dmu_objset_fast_stat(os, &zc->zc_objset_stats); + + /* + * NB: nvl_add_zplprop() will read the objset contents, + * which we aren't supposed to do with a DS_MODE_USER + * hold, because it could be inconsistent. + */ + if (zc->zc_nvlist_dst != NULL && + !zc->zc_objset_stats.dds_inconsistent && + dmu_objset_type(os) == DMU_OST_ZFS) { + nvlist_t *nv; + + VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); + if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 && + (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 && + (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 && + (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0) + err = put_nvlist(zc, nv); + nvlist_free(nv); + } else { + err = ENOENT; + } + dmu_objset_close(os); + return (err); +} + +/* + * inputs: + * zc_name name of filesystem + * zc_cookie zap cursor + * zc_nvlist_dst_size size of buffer for property nvlist + * + * outputs: + * zc_name name of next filesystem + * zc_objset_stats stats + * zc_nvlist_dst property nvlist + * zc_nvlist_dst_size size of property nvlist + */ +static int +zfs_ioc_dataset_list_next(zfs_cmd_t *zc) +{ + objset_t *os; + int error; + char *p; + + if (error = dmu_objset_open(zc->zc_name, + DMU_OST_ANY, DS_MODE_USER | DS_MODE_READONLY, &os)) { + 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)); + dmu_objset_close(os); + + /* + * 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 */ + + return (error); +} + +/* + * inputs: + * zc_name name of filesystem + * zc_cookie zap cursor + * zc_nvlist_dst_size size of buffer for property nvlist + * + * outputs: + * zc_name name of next snapshot + * zc_objset_stats stats + * zc_nvlist_dst property nvlist + * zc_nvlist_dst_size size of property nvlist + */ +static int +zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) +{ + objset_t *os; + int error; + + error = dmu_objset_open(zc->zc_name, + DMU_OST_ANY, DS_MODE_USER | DS_MODE_READONLY, &os); + if (error) + return (error == ENOENT ? ESRCH : 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, NULL); + dmu_objset_close(os); + if (error == 0) + error = zfs_ioc_objset_stats(zc); /* fill in the stats */ + else if (error == ENOENT) + error = ESRCH; + + /* if we failed, undo the @ that we tacked on to zc_name */ + if (error) + *strchr(zc->zc_name, '@') = '\0'; + return (error); +} + +int +zfs_set_prop_nvlist(const char *name, nvlist_t *nvl) +{ + nvpair_t *elem; + int error; + uint64_t intval; + char *strval; + + /* + * First validate permission to set all of the properties + */ + elem = NULL; + while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { + const char *propname = nvpair_name(elem); + zfs_prop_t prop = zfs_name_to_prop(propname); + + if (prop == ZPROP_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); + + if (error = zfs_secpolicy_write_perms(name, + ZFS_DELEG_PERM_USERPROP, CRED())) + return (error); + continue; + } + + if ((error = zfs_secpolicy_setprop(name, prop, CRED())) != 0) + return (error); + + /* + * Check that this value is valid for this pool version + */ + switch (prop) { + 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) { + if (intval >= ZIO_COMPRESS_GZIP_1 && + intval <= ZIO_COMPRESS_GZIP_9 && + zfs_earlier_version(name, + SPA_VERSION_GZIP_COMPRESSION)) + return (ENOTSUP); + + /* + * If this is a bootable dataset then + * verify that the compression algorithm + * is supported for booting. We must return + * something other than ENOTSUP since it + * implies a downrev pool version. + */ + if (zfs_is_bootfs(name) && + !BOOTFS_COMPRESS_VALID(intval)) + return (ERANGE); + } + break; + + case ZFS_PROP_COPIES: + if (zfs_earlier_version(name, + SPA_VERSION_DITTO_BLOCKS)) + return (ENOTSUP); + break; + + case ZFS_PROP_SHARESMB: + if (zpl_earlier_version(name, ZPL_VERSION_FUID)) + return (ENOTSUP); + break; + + case ZFS_PROP_ACLINHERIT: + if (nvpair_type(elem) == DATA_TYPE_UINT64 && + nvpair_value_uint64(elem, &intval) == 0) + if (intval == ZFS_ACL_PASSTHROUGH_X && + zfs_earlier_version(name, + SPA_VERSION_PASSTHROUGH_X)) + return (ENOTSUP); + } + } + + elem = NULL; + while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { + const char *propname = nvpair_name(elem); + zfs_prop_t prop = zfs_name_to_prop(propname); + + if (prop == ZPROP_INVAL) { + 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); + } + + 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_REFQUOTA: + if ((error = nvpair_value_uint64(elem, &intval)) != 0 || + (error = dsl_dataset_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_REFRESERVATION: + if ((error = nvpair_value_uint64(elem, &intval)) != 0 || + (error = dsl_dataset_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, + ddi_driver_major(zfs_dip), 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; + + case ZFS_PROP_VERSION: + if ((error = nvpair_value_uint64(elem, &intval)) != 0 || + (error = zfs_set_version(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_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); +} + +/* + * inputs: + * zc_name name of filesystem + * zc_value name of property to inherit + * zc_nvlist_src{_size} nvlist of properties to apply + * zc_cookie clear existing local props? + * + * outputs: none + */ +static int +zfs_ioc_set_prop(zfs_cmd_t *zc) +{ + nvlist_t *nvl; + int error; + + if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, + &nvl)) != 0) + return (error); + + if (zc->zc_cookie) { + nvlist_t *origprops; + objset_t *os; + + if (dmu_objset_open(zc->zc_name, DMU_OST_ANY, + DS_MODE_USER | DS_MODE_READONLY, &os) == 0) { + if (dsl_prop_get_all(os, &origprops, TRUE) == 0) { + clear_props(zc->zc_name, origprops); + nvlist_free(origprops); + } + dmu_objset_close(os); + } + + } + + error = zfs_set_prop_nvlist(zc->zc_name, nvl); + + nvlist_free(nvl); + return (error); +} + +/* + * inputs: + * zc_name name of filesystem + * zc_value name of property to inherit + * + * outputs: none + */ +static int +zfs_ioc_inherit_prop(zfs_cmd_t *zc) +{ + /* the property name has been validated by zfs_secpolicy_inherit() */ + return (dsl_prop_set(zc->zc_name, zc->zc_value, 0, 0, NULL)); +} + +static int +zfs_ioc_pool_set_props(zfs_cmd_t *zc) +{ + nvlist_t *props; + spa_t *spa; + int error; + + if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, + &props))) + return (error); + + if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { + nvlist_free(props); + return (error); + } + + error = spa_prop_set(spa, props); + + nvlist_free(props); + 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_prop_get(spa, &nvp); + + if (error == 0 && zc->zc_nvlist_dst != NULL) + error = put_nvlist(zc, nvp); + else + error = EFAULT; + + spa_close(spa, FTAG); + + if (nvp) + nvlist_free(nvp); + return (error); +} + +static int +zfs_ioc_iscsi_perm_check(zfs_cmd_t *zc) +{ + nvlist_t *nvp; + int error; + uint32_t uid; + uint32_t gid; + uint32_t *groups; + uint_t group_cnt; + cred_t *usercred; + + if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, + &nvp)) != 0) { + return (error); + } + + if ((error = nvlist_lookup_uint32(nvp, + ZFS_DELEG_PERM_UID, &uid)) != 0) { + nvlist_free(nvp); + return (EPERM); + } + + if ((error = nvlist_lookup_uint32(nvp, + ZFS_DELEG_PERM_GID, &gid)) != 0) { + nvlist_free(nvp); + return (EPERM); + } + + if ((error = nvlist_lookup_uint32_array(nvp, ZFS_DELEG_PERM_GROUPS, + &groups, &group_cnt)) != 0) { + nvlist_free(nvp); + return (EPERM); + } + usercred = cralloc(); + if ((crsetugid(usercred, uid, gid) != 0) || + (crsetgroups(usercred, group_cnt, (gid_t *)groups) != 0)) { + nvlist_free(nvp); + crfree(usercred); + return (EPERM); + } + nvlist_free(nvp); + error = dsl_deleg_access(zc->zc_name, + zfs_prop_to_name(ZFS_PROP_SHAREISCSI), usercred); + crfree(usercred); + return (error); +} + +/* + * inputs: + * zc_name name of filesystem + * zc_nvlist_src{_size} nvlist of delegated permissions + * zc_perm_action allow/unallow flag + * + * outputs: none + */ +static int +zfs_ioc_set_fsacl(zfs_cmd_t *zc) +{ + int error; + nvlist_t *fsaclnv = NULL; + + if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, + &fsaclnv)) != 0) + return (error); + + /* + * Verify nvlist is constructed correctly + */ + if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) { + nvlist_free(fsaclnv); + return (EINVAL); + } + + /* + * If we don't have PRIV_SYS_MOUNT, then validate + * that user is allowed to hand out each permission in + * the nvlist(s) + */ + + error = secpolicy_zfs(CRED()); + if (error) { + if (zc->zc_perm_action == B_FALSE) { + error = dsl_deleg_can_allow(zc->zc_name, + fsaclnv, CRED()); + } else { + error = dsl_deleg_can_unallow(zc->zc_name, + fsaclnv, CRED()); + } + } + + if (error == 0) + error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action); + + nvlist_free(fsaclnv); + return (error); +} + +/* + * inputs: + * zc_name name of filesystem + * + * outputs: + * zc_nvlist_src{_size} nvlist of delegated permissions + */ +static int +zfs_ioc_get_fsacl(zfs_cmd_t *zc) +{ + nvlist_t *nvp; + int error; + + if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) { + error = put_nvlist(zc, nvp); + nvlist_free(nvp); + } + + return (error); +} + +/* + * inputs: + * zc_name name of volume + * + * outputs: none + */ +static int +zfs_ioc_create_minor(zfs_cmd_t *zc) +{ + return (zvol_create_minor(zc->zc_name, ddi_driver_major(zfs_dip))); +} + +/* + * inputs: + * zc_name name of volume + * + * outputs: none + */ +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) +{ + struct vfs *vfsp; + struct vfs *vfs_found = NULL; + + vfs_list_read_lock(); + vfsp = rootvfs; + do { + if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { + VFS_HOLD(vfsp); + vfs_found = vfsp; + break; + } + vfsp = vfsp->vfs_next; + } while (vfsp != rootvfs); + vfs_list_unlock(); + return (vfs_found); +} + +/* ARGSUSED */ +static void +zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) +{ + zfs_creat_t *zct = arg; + + zfs_create_fs(os, cr, zct->zct_zplprops, tx); +} + +#define ZFS_PROP_UNDEFINED ((uint64_t)-1) + +/* + * inputs: + * createprops list of properties requested by creator + * default_zplver zpl version to use if unspecified in createprops + * fuids_ok fuids allowed in this version of the spa? + * os parent objset pointer (NULL if root fs) + * + * outputs: + * zplprops values for the zplprops we attach to the master node object + * is_ci true if requested file system will be purely case-insensitive + * + * Determine the settings for utf8only, normalization and + * casesensitivity. Specific values may have been requested by the + * creator and/or we can inherit values from the parent dataset. If + * the file system is of too early a vintage, a creator can not + * request settings for these properties, even if the requested + * setting is the default value. We don't actually want to create dsl + * properties for these, so remove them from the source nvlist after + * processing. + */ +static int +zfs_fill_zplprops_impl(objset_t *os, uint64_t default_zplver, + boolean_t fuids_ok, nvlist_t *createprops, nvlist_t *zplprops, + boolean_t *is_ci) +{ + uint64_t zplver = default_zplver; + uint64_t sense = ZFS_PROP_UNDEFINED; + uint64_t norm = ZFS_PROP_UNDEFINED; + uint64_t u8 = ZFS_PROP_UNDEFINED; + + ASSERT(zplprops != NULL); + + /* + * Pull out creator prop choices, if any. + */ + if (createprops) { + (void) nvlist_lookup_uint64(createprops, + zfs_prop_to_name(ZFS_PROP_VERSION), &zplver); + (void) nvlist_lookup_uint64(createprops, + zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm); + (void) nvlist_remove_all(createprops, + zfs_prop_to_name(ZFS_PROP_NORMALIZE)); + (void) nvlist_lookup_uint64(createprops, + zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8); + (void) nvlist_remove_all(createprops, + zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); + (void) nvlist_lookup_uint64(createprops, + zfs_prop_to_name(ZFS_PROP_CASE), &sense); + (void) nvlist_remove_all(createprops, + zfs_prop_to_name(ZFS_PROP_CASE)); + } + + /* + * If the zpl version requested is whacky or the file system + * or pool is version is too "young" to support normalization + * and the creator tried to set a value for one of the props, + * error out. + */ + if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) || + (zplver >= ZPL_VERSION_FUID && !fuids_ok) || + (zplver < ZPL_VERSION_NORMALIZATION && + (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED || + sense != ZFS_PROP_UNDEFINED))) + return (ENOTSUP); + + /* + * Put the version in the zplprops + */ + VERIFY(nvlist_add_uint64(zplprops, + zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0); + + if (norm == ZFS_PROP_UNDEFINED) + VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0); + VERIFY(nvlist_add_uint64(zplprops, + zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0); + + /* + * If we're normalizing, names must always be valid UTF-8 strings. + */ + if (norm) + u8 = 1; + if (u8 == ZFS_PROP_UNDEFINED) + VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0); + VERIFY(nvlist_add_uint64(zplprops, + zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0); + + if (sense == ZFS_PROP_UNDEFINED) + VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0); + VERIFY(nvlist_add_uint64(zplprops, + zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0); + + if (is_ci) + *is_ci = (sense == ZFS_CASE_INSENSITIVE); + + return (0); +} + +static int +zfs_fill_zplprops(const char *dataset, nvlist_t *createprops, + nvlist_t *zplprops, boolean_t *is_ci) +{ + boolean_t fuids_ok = B_TRUE; + uint64_t zplver = ZPL_VERSION; + objset_t *os = NULL; + char parentname[MAXNAMELEN]; + char *cp; + int error; + + (void) strlcpy(parentname, dataset, sizeof (parentname)); + cp = strrchr(parentname, '/'); + ASSERT(cp != NULL); + cp[0] = '\0'; + + if (zfs_earlier_version(dataset, SPA_VERSION_FUID)) { + zplver = ZPL_VERSION_FUID - 1; + fuids_ok = B_FALSE; + } + + /* + * Open parent object set so we can inherit zplprop values. + */ + if ((error = dmu_objset_open(parentname, DMU_OST_ANY, + DS_MODE_USER | DS_MODE_READONLY, &os)) != 0) + return (error); + + error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, createprops, + zplprops, is_ci); + dmu_objset_close(os); + return (error); +} + +static int +zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops, + nvlist_t *zplprops, boolean_t *is_ci) +{ + boolean_t fuids_ok = B_TRUE; + uint64_t zplver = ZPL_VERSION; + int error; + + if (spa_vers < SPA_VERSION_FUID) { + zplver = ZPL_VERSION_FUID - 1; + fuids_ok = B_FALSE; + } + + error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, createprops, + zplprops, is_ci); + return (error); +} + +/* + * inputs: + * zc_objset_type type of objset to create (fs vs zvol) + * zc_name name of new objset + * zc_value name of snapshot to clone from (may be empty) + * zc_nvlist_src{_size} nvlist of properties to apply + * + * outputs: none + */ +static int +zfs_ioc_create(zfs_cmd_t *zc) +{ + objset_t *clone; + int error = 0; + zfs_creat_t zct; + nvlist_t *nvprops = NULL; + void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, 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; + break; + } + if (strchr(zc->zc_name, '@') || + strchr(zc->zc_name, '%')) + return (EINVAL); + + if (zc->zc_nvlist_src != NULL && + (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, + &nvprops)) != 0) + return (error); + + zct.zct_zplprops = NULL; + zct.zct_props = nvprops; + + 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(nvprops); + return (EINVAL); + } + + error = dmu_objset_open(zc->zc_value, type, + DS_MODE_USER | DS_MODE_READONLY, &clone); + if (error) { + nvlist_free(nvprops); + return (error); + } + + error = dmu_objset_create(zc->zc_name, type, clone, 0, + NULL, NULL); + if (error) { + dmu_objset_close(clone); + nvlist_free(nvprops); + return (error); + } + dmu_objset_close(clone); + } else { + boolean_t is_insensitive = B_FALSE; + + if (cbfunc == NULL) { + nvlist_free(nvprops); + return (EINVAL); + } + + if (type == DMU_OST_ZVOL) { + uint64_t volsize, volblocksize; + + if (nvprops == NULL || + nvlist_lookup_uint64(nvprops, + zfs_prop_to_name(ZFS_PROP_VOLSIZE), + &volsize) != 0) { + nvlist_free(nvprops); + return (EINVAL); + } + + if ((error = nvlist_lookup_uint64(nvprops, + zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), + &volblocksize)) != 0 && error != ENOENT) { + nvlist_free(nvprops); + 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(nvprops); + return (error); + } + } else if (type == DMU_OST_ZFS) { + int error; + + /* + * We have to have normalization and + * case-folding flags correct when we do the + * file system creation, so go figure them out + * now. + */ + VERIFY(nvlist_alloc(&zct.zct_zplprops, + NV_UNIQUE_NAME, KM_SLEEP) == 0); + error = zfs_fill_zplprops(zc->zc_name, nvprops, + zct.zct_zplprops, &is_insensitive); + if (error != 0) { + nvlist_free(nvprops); + nvlist_free(zct.zct_zplprops); + return (error); + } + } + error = dmu_objset_create(zc->zc_name, type, NULL, + is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct); + nvlist_free(zct.zct_zplprops); + } + + /* + * It would be nice to do this atomically. + */ + if (error == 0) { + if ((error = zfs_set_prop_nvlist(zc->zc_name, nvprops)) != 0) + (void) dmu_objset_destroy(zc->zc_name); + } + nvlist_free(nvprops); + return (error); +} + +struct snap_prop_arg { + nvlist_t *nvprops; + const char *snapname; +}; + +static int +set_snap_props(char *name, void *arg) +{ + struct snap_prop_arg *snpa = arg; + int len = strlen(name) + strlen(snpa->snapname) + 2; + char *buf = kmem_alloc(len, KM_SLEEP); + int err; + + (void) snprintf(buf, len, "%s@%s", name, snpa->snapname); + err = zfs_set_prop_nvlist(buf, snpa->nvprops); + if (err) + (void) dmu_objset_destroy(buf); + kmem_free(buf, len); + return (err); +} + +/* + * inputs: + * zc_name name of filesystem + * zc_value short name of snapshot + * zc_cookie recursive flag + * + * outputs: none + */ +static int +zfs_ioc_snapshot(zfs_cmd_t *zc) +{ + nvlist_t *nvprops = NULL; + int error; + boolean_t recursive = zc->zc_cookie; + + if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) + return (EINVAL); + + if (zc->zc_nvlist_src != NULL && + (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, + &nvprops)) != 0) + return (error); + + error = dmu_objset_snapshot(zc->zc_name, zc->zc_value, recursive); + + /* + * It would be nice to do this atomically. + */ + if (error == 0) { + struct snap_prop_arg snpa; + snpa.nvprops = nvprops; + snpa.snapname = zc->zc_value; + if (recursive) { + error = dmu_objset_find(zc->zc_name, + set_snap_props, &snpa, DS_FIND_CHILDREN); + if (error) { + (void) dmu_snapshots_destroy(zc->zc_name, + zc->zc_value); + } + } else { + error = set_snap_props(zc->zc_name, &snpa); + } + } + nvlist_free(nvprops); + return (error); +} + +int +zfs_unmount_snap(char *name, void *arg) +{ + vfs_t *vfsp = NULL; + + if (arg) { + char *snapname = arg; + int len = strlen(name) + strlen(snapname) + 2; + char *buf = kmem_alloc(len, KM_SLEEP); + + (void) strcpy(buf, name); + (void) strcat(buf, "@"); + (void) strcat(buf, snapname); + vfsp = zfs_get_vfs(buf); + kmem_free(buf, len); + } 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); + if ((err = dounmount(vfsp, flag, kcred)) != 0) + return (err); + } + return (0); +} + +/* + * inputs: + * zc_name name of filesystem + * zc_value short name of snapshot + * + * outputs: none + */ +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)); +} + +/* + * inputs: + * zc_name name of dataset to destroy + * zc_objset_type type of objset + * + * outputs: none + */ +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)); +} + +/* + * inputs: + * zc_name name of dataset to rollback (to most recent snapshot) + * + * outputs: none + */ +static int +zfs_ioc_rollback(zfs_cmd_t *zc) +{ + objset_t *os; + int error; + zfsvfs_t *zfsvfs = NULL; + + /* + * Get the zfsvfs for the receiving objset. There + * won't be one if we're operating on a zvol, if the + * objset doesn't exist yet, or is not mounted. + */ + error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, DS_MODE_USER, &os); + if (error) + return (error); + + if (dmu_objset_type(os) == DMU_OST_ZFS) { + mutex_enter(&os->os->os_user_ptr_lock); + zfsvfs = dmu_objset_get_user(os); + if (zfsvfs != NULL) + VFS_HOLD(zfsvfs->z_vfs); + mutex_exit(&os->os->os_user_ptr_lock); + } + + if (zfsvfs != NULL) { + char *osname; + int mode; + + osname = kmem_alloc(MAXNAMELEN, KM_SLEEP); + error = zfs_suspend_fs(zfsvfs, osname, &mode); + if (error == 0) { + int resume_err; + + ASSERT(strcmp(osname, zc->zc_name) == 0); + error = dmu_objset_rollback(os); + resume_err = zfs_resume_fs(zfsvfs, osname, mode); + error = error ? error : resume_err; + } else { + dmu_objset_close(os); + } + kmem_free(osname, MAXNAMELEN); + VFS_RELE(zfsvfs->z_vfs); + } else { + error = dmu_objset_rollback(os); + } + /* Note, the dmu_objset_rollback() releases the objset for us. */ + + return (error); +} + +/* + * inputs: + * zc_name old name of dataset + * zc_value new name of dataset + * zc_cookie recursive flag (only valid for snapshots) + * + * outputs: none + */ +static int +zfs_ioc_rename(zfs_cmd_t *zc) +{ + boolean_t recursive = zc->zc_cookie & 1; + + zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; + if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || + strchr(zc->zc_value, '%')) + 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 void +clear_props(char *dataset, nvlist_t *props) +{ + zfs_cmd_t *zc; + nvpair_t *prop; + + if (props == NULL) + return; + zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP); + (void) strcpy(zc->zc_name, dataset); + for (prop = nvlist_next_nvpair(props, NULL); prop; + prop = nvlist_next_nvpair(props, prop)) { + (void) strcpy(zc->zc_value, nvpair_name(prop)); + if (zfs_secpolicy_inherit(zc, CRED()) == 0) + (void) zfs_ioc_inherit_prop(zc); + } + kmem_free(zc, sizeof (zfs_cmd_t)); +} + +/* + * inputs: + * zc_name name of containing filesystem + * zc_nvlist_src{_size} nvlist of properties to apply + * zc_value name of snapshot to create + * zc_string name of clone origin (if DRR_FLAG_CLONE) + * zc_cookie file descriptor to recv from + * zc_begin_record the BEGIN record of the stream (not byteswapped) + * zc_guid force flag + * + * outputs: + * zc_cookie number of bytes read + */ +static int +zfs_ioc_recv(zfs_cmd_t *zc) +{ + file_t *fp; + objset_t *os; + dmu_recv_cookie_t drc; + zfsvfs_t *zfsvfs = NULL; + boolean_t force = (boolean_t)zc->zc_guid; + int error, fd; + offset_t off; + nvlist_t *props = NULL; + nvlist_t *origprops = NULL; + objset_t *origin = NULL; + char *tosnap; + char tofs[ZFS_MAXNAMELEN]; + + if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || + strchr(zc->zc_value, '@') == NULL || + strchr(zc->zc_value, '%')) + return (EINVAL); + + (void) strcpy(tofs, zc->zc_value); + tosnap = strchr(tofs, '@'); + *tosnap = '\0'; + tosnap++; + + if (zc->zc_nvlist_src != NULL && + (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, + &props)) != 0) + return (error); + + fd = zc->zc_cookie; + fp = getf(fd); + if (fp == NULL) { + nvlist_free(props); + return (EBADF); + } + + if (dmu_objset_open(tofs, DMU_OST_ANY, + DS_MODE_USER | DS_MODE_READONLY, &os) == 0) { + /* + * Try to get the zfsvfs for the receiving objset. + * There won't be one if we're operating on a zvol, + * if the objset doesn't exist yet, or is not mounted. + */ + mutex_enter(&os->os->os_user_ptr_lock); + if (zfsvfs = dmu_objset_get_user(os)) { + if (!mutex_tryenter(&zfsvfs->z_online_recv_lock)) { + mutex_exit(&os->os->os_user_ptr_lock); + dmu_objset_close(os); + zfsvfs = NULL; + error = EBUSY; + goto out; + } + VFS_HOLD(zfsvfs->z_vfs); + } + mutex_exit(&os->os->os_user_ptr_lock); + + /* + * If new properties are supplied, they are to completely + * replace the existing ones, so stash away the existing ones. + */ + if (props) + (void) dsl_prop_get_all(os, &origprops, TRUE); + + dmu_objset_close(os); + } + + if (zc->zc_string[0]) { + error = dmu_objset_open(zc->zc_string, DMU_OST_ANY, + DS_MODE_USER | DS_MODE_READONLY, &origin); + if (error) + goto out; + } + + error = dmu_recv_begin(tofs, tosnap, &zc->zc_begin_record, + force, origin, zfsvfs != NULL, &drc); + if (origin) + dmu_objset_close(origin); + if (error) + goto out; + + /* + * Reset properties. We do this before we receive the stream + * so that the properties are applied to the new data. + */ + if (props) { + clear_props(tofs, origprops); + /* + * XXX - Note, this is all-or-nothing; should be best-effort. + */ + (void) zfs_set_prop_nvlist(tofs, props); + } + + off = fp->f_offset; + error = dmu_recv_stream(&drc, fp->f_vnode, &off); + + if (error == 0 && zfsvfs) { + char *osname; + int mode; + + /* online recv */ + osname = kmem_alloc(MAXNAMELEN, KM_SLEEP); + error = zfs_suspend_fs(zfsvfs, osname, &mode); + if (error == 0) { + int resume_err; + + error = dmu_recv_end(&drc); + resume_err = zfs_resume_fs(zfsvfs, osname, mode); + error = error ? error : resume_err; + } else { + dmu_recv_abort_cleanup(&drc); + } + kmem_free(osname, MAXNAMELEN); + } else if (error == 0) { + error = dmu_recv_end(&drc); + } + + zc->zc_cookie = off - fp->f_offset; + if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) + fp->f_offset = off; + + /* + * On error, restore the original props. + */ + if (error && props) { + clear_props(tofs, props); + (void) zfs_set_prop_nvlist(tofs, origprops); + } +out: + if (zfsvfs) { + mutex_exit(&zfsvfs->z_online_recv_lock); + VFS_RELE(zfsvfs->z_vfs); + } + nvlist_free(props); + nvlist_free(origprops); + releasef(fd); + return (error); +} + +/* + * inputs: + * zc_name name of snapshot to send + * zc_value short name of incremental fromsnap (may be empty) + * zc_cookie file descriptor to send stream to + * zc_obj fromorigin flag (mutually exclusive with zc_value) + * + * outputs: none + */ +static int +zfs_ioc_send(zfs_cmd_t *zc) +{ + objset_t *fromsnap = NULL; + objset_t *tosnap; + file_t *fp; + int error; + offset_t off; + + error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, + DS_MODE_USER | DS_MODE_READONLY, &tosnap); + if (error) + return (error); + + if (zc->zc_value[0] != '\0') { + char *buf; + char *cp; + + buf = kmem_alloc(MAXPATHLEN, KM_SLEEP); + (void) strncpy(buf, zc->zc_name, MAXPATHLEN); + cp = strchr(buf, '@'); + if (cp) + *(cp+1) = 0; + (void) strncat(buf, zc->zc_value, MAXPATHLEN); + error = dmu_objset_open(buf, DMU_OST_ANY, + DS_MODE_USER | DS_MODE_READONLY, &fromsnap); + kmem_free(buf, MAXPATHLEN); + if (error) { + dmu_objset_close(tosnap); + return (error); + } + } + + fp = getf(zc->zc_cookie); + if (fp == NULL) { + dmu_objset_close(tosnap); + if (fromsnap) + dmu_objset_close(fromsnap); + return (EBADF); + } + + off = fp->f_offset; + error = dmu_sendbackup(tosnap, fromsnap, zc->zc_obj, fp->f_vnode, &off); + + if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) + fp->f_offset = off; + releasef(zc->zc_cookie); + 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; + + /* + * On zpool clear we also fix up missing slogs + */ + mutex_enter(&spa_namespace_lock); + spa = spa_lookup(zc->zc_name); + if (spa == NULL) { + mutex_exit(&spa_namespace_lock); + return (EIO); + } + if (spa->spa_log_state == SPA_LOG_MISSING) { + /* we need to let spa_open/spa_load clear the chains */ + spa->spa_log_state = SPA_LOG_CLEAR; + } + mutex_exit(&spa_namespace_lock); + + if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) + return (error); + + spa_vdev_state_enter(spa); + + if (zc->zc_guid == 0) { + vd = NULL; + } else { + vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE); + if (vd == NULL) { + (void) spa_vdev_state_exit(spa, NULL, ENODEV); + spa_close(spa, FTAG); + return (ENODEV); + } + } + + vdev_clear(spa, vd); + + (void) spa_vdev_state_exit(spa, NULL, 0); + + /* + * Resume any suspended I/Os. + */ + zio_resume(spa); + + spa_close(spa, FTAG); + + return (0); +} + +/* + * inputs: + * zc_name name of filesystem + * zc_value name of origin snapshot + * + * outputs: none + */ +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)); +} + +/* + * We don't want to have a hard dependency + * against some special symbols in sharefs + * nfs, and smbsrv. Determine them if needed when + * the first file system is shared. + * Neither sharefs, nfs or smbsrv are unloadable modules. + */ +int (*znfsexport_fs)(void *arg); +int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); +int (*zsmbexport_fs)(void *arg, boolean_t add_share); + +int zfs_nfsshare_inited; +int zfs_smbshare_inited; + +ddi_modhandle_t nfs_mod; +ddi_modhandle_t sharefs_mod; +ddi_modhandle_t smbsrv_mod; +kmutex_t zfs_share_lock; + +static int +zfs_init_sharefs() +{ + int error; + + ASSERT(MUTEX_HELD(&zfs_share_lock)); + /* Both NFS and SMB shares also require sharetab support. */ + if (sharefs_mod == NULL && ((sharefs_mod = + ddi_modopen("fs/sharefs", + KRTLD_MODE_FIRST, &error)) == NULL)) { + return (ENOSYS); + } + if (zshare_fs == NULL && ((zshare_fs = + (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) + ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { + return (ENOSYS); + } + return (0); +} + +static int +zfs_ioc_share(zfs_cmd_t *zc) +{ + int error; + int opcode; + + switch (zc->zc_share.z_sharetype) { + case ZFS_SHARE_NFS: + case ZFS_UNSHARE_NFS: + if (zfs_nfsshare_inited == 0) { + mutex_enter(&zfs_share_lock); + if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs", + KRTLD_MODE_FIRST, &error)) == NULL)) { + mutex_exit(&zfs_share_lock); + return (ENOSYS); + } + if (znfsexport_fs == NULL && + ((znfsexport_fs = (int (*)(void *)) + ddi_modsym(nfs_mod, + "nfs_export", &error)) == NULL)) { + mutex_exit(&zfs_share_lock); + return (ENOSYS); + } + error = zfs_init_sharefs(); + if (error) { + mutex_exit(&zfs_share_lock); + return (ENOSYS); + } + zfs_nfsshare_inited = 1; + mutex_exit(&zfs_share_lock); + } + break; + case ZFS_SHARE_SMB: + case ZFS_UNSHARE_SMB: + if (zfs_smbshare_inited == 0) { + mutex_enter(&zfs_share_lock); + if (smbsrv_mod == NULL && ((smbsrv_mod = + ddi_modopen("drv/smbsrv", + KRTLD_MODE_FIRST, &error)) == NULL)) { + mutex_exit(&zfs_share_lock); + return (ENOSYS); + } + if (zsmbexport_fs == NULL && ((zsmbexport_fs = + (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod, + "smb_server_share", &error)) == NULL)) { + mutex_exit(&zfs_share_lock); + return (ENOSYS); + } + error = zfs_init_sharefs(); + if (error) { + mutex_exit(&zfs_share_lock); + return (ENOSYS); + } + zfs_smbshare_inited = 1; + mutex_exit(&zfs_share_lock); + } + break; + default: + return (EINVAL); + } + + switch (zc->zc_share.z_sharetype) { + case ZFS_SHARE_NFS: + case ZFS_UNSHARE_NFS: + if (error = + znfsexport_fs((void *) + (uintptr_t)zc->zc_share.z_exportdata)) + return (error); + break; + case ZFS_SHARE_SMB: + case ZFS_UNSHARE_SMB: + if (error = zsmbexport_fs((void *) + (uintptr_t)zc->zc_share.z_exportdata, + zc->zc_share.z_sharetype == ZFS_SHARE_SMB ? + B_TRUE : B_FALSE)) { + return (error); + } + break; + } + + opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS || + zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ? + SHAREFS_ADD : SHAREFS_REMOVE; + + /* + * Add or remove share from sharetab + */ + error = zshare_fs(opcode, + (void *)(uintptr_t)zc->zc_share.z_sharedata, + zc->zc_share.z_sharemax); + + return (error); + +} + +/* + * pool create, destroy, and export don't log the history as part of + * zfsdev_ioctl, but rather zfs_ioc_pool_create, and zfs_ioc_pool_export + * do the logging of those commands. + */ +static zfs_ioc_vec_t zfs_ioc_vec[] = { + { zfs_ioc_pool_create, zfs_secpolicy_config, POOL_NAME, B_FALSE }, + { zfs_ioc_pool_destroy, zfs_secpolicy_config, POOL_NAME, B_FALSE }, + { zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE }, + { zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE }, + { zfs_ioc_pool_configs, zfs_secpolicy_none, NO_NAME, B_FALSE }, + { zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE }, + { zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE }, + { zfs_ioc_pool_scrub, zfs_secpolicy_config, POOL_NAME, B_TRUE }, + { zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE }, + { zfs_ioc_pool_upgrade, zfs_secpolicy_config, POOL_NAME, B_TRUE }, + { zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE }, + { zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE }, + { zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE }, + { zfs_ioc_vdev_set_state, zfs_secpolicy_config, POOL_NAME, B_TRUE }, + { zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE }, + { zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE }, + { zfs_ioc_vdev_setpath, zfs_secpolicy_config, POOL_NAME, B_FALSE }, + { zfs_ioc_objset_stats, zfs_secpolicy_read, DATASET_NAME, B_FALSE }, + { zfs_ioc_objset_zplprops, zfs_secpolicy_read, DATASET_NAME, B_FALSE }, + { zfs_ioc_dataset_list_next, zfs_secpolicy_read, + DATASET_NAME, B_FALSE }, + { zfs_ioc_snapshot_list_next, zfs_secpolicy_read, + DATASET_NAME, B_FALSE }, + { zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE }, + { zfs_ioc_create_minor, zfs_secpolicy_minor, DATASET_NAME, B_FALSE }, + { zfs_ioc_remove_minor, zfs_secpolicy_minor, DATASET_NAME, B_FALSE }, + { zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE }, + { zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE }, + { zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE }, + { zfs_ioc_rename, zfs_secpolicy_rename, DATASET_NAME, B_TRUE }, + { zfs_ioc_recv, zfs_secpolicy_receive, DATASET_NAME, B_TRUE }, + { zfs_ioc_send, zfs_secpolicy_send, DATASET_NAME, B_TRUE }, + { zfs_ioc_inject_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE }, + { zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE }, + { zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE }, + { zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE }, + { zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE }, + { zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE }, + { zfs_ioc_destroy_snaps, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE }, + { zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE }, + { zfs_ioc_dsobj_to_dsname, zfs_secpolicy_config, POOL_NAME, B_FALSE }, + { zfs_ioc_obj_to_path, zfs_secpolicy_config, NO_NAME, B_FALSE }, + { zfs_ioc_pool_set_props, zfs_secpolicy_config, POOL_NAME, B_TRUE }, + { zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE }, + { zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE }, + { zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE }, + { zfs_ioc_iscsi_perm_check, zfs_secpolicy_iscsi, + DATASET_NAME, B_FALSE }, + { zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE }, + { zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE }, +}; + +static int +zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) +{ + zfs_cmd_t *zc; + uint_t vec; + int error, rc; + + if (getminor(dev) != 0) + return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp)); + + vec = cmd - ZFS_IOC; + ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); + + if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) + return (EINVAL); + + zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); + + error = xcopyin((void *)arg, zc, sizeof (zfs_cmd_t)); + + if (error == 0) + error = zfs_ioc_vec[vec].zvec_secpolicy(zc, cr); + + /* + * 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); + + rc = xcopyout(zc, (void *)arg, sizeof (zfs_cmd_t)); + if (error == 0) { + error = rc; + if (zfs_ioc_vec[vec].zvec_his_log == B_TRUE) + zfs_log_history(zc); + } + + kmem_free(zc, sizeof (zfs_cmd_t)); + return (error); +} + +static int +zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) +{ + if (cmd != DDI_ATTACH) + return (DDI_FAILURE); + + if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, + DDI_PSEUDO, 0) == DDI_FAILURE) + return (DDI_FAILURE); + + zfs_dip = dip; + + ddi_report_dev(dip); + + return (DDI_SUCCESS); +} + +static int +zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) +{ + if (spa_busy() || zfs_busy() || zvol_busy()) + return (DDI_FAILURE); + + if (cmd != DDI_DETACH) + return (DDI_FAILURE); + + zfs_dip = NULL; + + ddi_prop_remove_all(dip); + ddi_remove_minor_node(dip, NULL); + + return (DDI_SUCCESS); +} + +/*ARGSUSED*/ +static int +zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) +{ + switch (infocmd) { + case DDI_INFO_DEVT2DEVINFO: + *result = zfs_dip; + return (DDI_SUCCESS); + + case DDI_INFO_DEVT2INSTANCE: + *result = (void *)0; + return (DDI_SUCCESS); + } + + return (DDI_FAILURE); +} + +/* + * 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 cb_ops zfs_cb_ops = { + zvol_open, /* open */ + zvol_close, /* close */ + zvol_strategy, /* strategy */ + nodev, /* print */ + zvol_dump, /* dump */ + zvol_read, /* read */ + zvol_write, /* write */ + zfsdev_ioctl, /* ioctl */ + nodev, /* devmap */ + nodev, /* mmap */ + nodev, /* segmap */ + nochpoll, /* poll */ + ddi_prop_op, /* prop_op */ + NULL, /* streamtab */ + D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ + CB_REV, /* version */ + nodev, /* async read */ + nodev, /* async write */ +}; + +static struct dev_ops zfs_dev_ops = { + DEVO_REV, /* version */ + 0, /* refcnt */ + zfs_info, /* info */ + nulldev, /* identify */ + nulldev, /* probe */ + zfs_attach, /* attach */ + zfs_detach, /* detach */ + nodev, /* reset */ + &zfs_cb_ops, /* driver operations */ + NULL, /* no bus operations */ + NULL, /* power */ + ddi_quiesce_not_needed, /* quiesce */ +}; + +static struct modldrv zfs_modldrv = { + &mod_driverops, + "ZFS storage pool", + &zfs_dev_ops +}; + +static struct modlinkage modlinkage = { + MODREV_1, + (void *)&zfs_modlfs, + (void *)&zfs_modldrv, + NULL +}; + + +uint_t zfs_fsyncer_key; +extern uint_t rrw_tsd_key; + +int +_init(void) +{ + int error; + + spa_init(FREAD | FWRITE); + zfs_init(); + zvol_init(); + + if ((error = mod_install(&modlinkage)) != 0) { + zvol_fini(); + zfs_fini(); + spa_fini(); + return (error); + } + + tsd_create(&zfs_fsyncer_key, NULL); + tsd_create(&rrw_tsd_key, NULL); + + error = ldi_ident_from_mod(&modlinkage, &zfs_li); + ASSERT(error == 0); + mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); + + return (0); +} + +int +_fini(void) +{ + int error; + + if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) + return (EBUSY); + + if ((error = mod_remove(&modlinkage)) != 0) + return (error); + + zvol_fini(); + zfs_fini(); + spa_fini(); + if (zfs_nfsshare_inited) + (void) ddi_modclose(nfs_mod); + if (zfs_smbshare_inited) + (void) ddi_modclose(smbsrv_mod); + if (zfs_nfsshare_inited || zfs_smbshare_inited) + (void) ddi_modclose(sharefs_mod); + + tsd_destroy(&zfs_fsyncer_key); + ldi_ident_release(zfs_li); + zfs_li = NULL; + mutex_destroy(&zfs_share_lock); + + return (error); +} + +int +_info(struct modinfo *modinfop) +{ + return (mod_info(&modlinkage, modinfop)); +} |