libzfs: return (allocated) strings instead of filling buffers

[mirror_zfs.git] / include / libzfs.h

/*
 * 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2011, 2020 by Delphix. All rights reserved.
 * Copyright Joyent, Inc.
 * Copyright (c) 2013 Steven Hartland. All rights reserved.
 * Copyright (c) 2016, Intel Corporation.
 * Copyright 2016 Nexenta Systems, Inc.
 * Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
 * Copyright (c) 2019 Datto Inc.
 * Copyright (c) 2021, Colm Buckley <colm@tuatha.org>
 */

#ifndef _LIBZFS_H
#define _LIBZFS_H extern __attribute__((visibility("default")))

#include <assert.h>
#include <libshare.h>
#include <libnvpair.h>
#include <sys/mnttab.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/fs/zfs.h>
#include <sys/avl.h>
#include <libzfs_core.h>

#ifdef  __cplusplus
extern "C" {
#endif

/*
 * Miscellaneous ZFS constants
 */
#define ZFS_MAXPROPLEN          MAXPATHLEN
#define ZPOOL_MAXPROPLEN        MAXPATHLEN

/*
 * libzfs errors
 */
typedef enum zfs_error {
        EZFS_SUCCESS = 0,       /* no error -- success */
        EZFS_NOMEM = 2000,      /* out of memory */
        EZFS_BADPROP,           /* invalid property value */
        EZFS_PROPREADONLY,      /* cannot set readonly property */
        EZFS_PROPTYPE,          /* property does not apply to dataset type */
        EZFS_PROPNONINHERIT,    /* property is not inheritable */
        EZFS_PROPSPACE,         /* bad quota or reservation */
        EZFS_BADTYPE,           /* dataset is not of appropriate type */
        EZFS_BUSY,              /* pool or dataset is busy */
        EZFS_EXISTS,            /* pool or dataset already exists */
        EZFS_NOENT,             /* no such pool or dataset */
        EZFS_BADSTREAM,         /* bad backup stream */
        EZFS_DSREADONLY,        /* dataset is readonly */
        EZFS_VOLTOOBIG,         /* volume is too large for 32-bit system */
        EZFS_INVALIDNAME,       /* invalid dataset name */
        EZFS_BADRESTORE,        /* unable to restore to destination */
        EZFS_BADBACKUP,         /* backup failed */
        EZFS_BADTARGET,         /* bad attach/detach/replace target */
        EZFS_NODEVICE,          /* no such device in pool */
        EZFS_BADDEV,            /* invalid device to add */
        EZFS_NOREPLICAS,        /* no valid replicas */
        EZFS_RESILVERING,       /* resilvering (healing reconstruction) */
        EZFS_BADVERSION,        /* unsupported version */
        EZFS_POOLUNAVAIL,       /* pool is currently unavailable */
        EZFS_DEVOVERFLOW,       /* too many devices in one vdev */
        EZFS_BADPATH,           /* must be an absolute path */
        EZFS_CROSSTARGET,       /* rename or clone across pool or dataset */
        EZFS_ZONED,             /* used improperly in local zone */
        EZFS_MOUNTFAILED,       /* failed to mount dataset */
        EZFS_UMOUNTFAILED,      /* failed to unmount dataset */
        EZFS_UNSHARENFSFAILED,  /* failed to unshare over nfs */
        EZFS_SHARENFSFAILED,    /* failed to share over nfs */
        EZFS_PERM,              /* permission denied */
        EZFS_NOSPC,             /* out of space */
        EZFS_FAULT,             /* bad address */
        EZFS_IO,                /* I/O error */
        EZFS_INTR,              /* signal received */
        EZFS_ISSPARE,           /* device is a hot spare */
        EZFS_INVALCONFIG,       /* invalid vdev configuration */
        EZFS_RECURSIVE,         /* recursive dependency */
        EZFS_NOHISTORY,         /* no history object */
        EZFS_POOLPROPS,         /* couldn't retrieve pool props */
        EZFS_POOL_NOTSUP,       /* ops not supported for this type of pool */
        EZFS_POOL_INVALARG,     /* invalid argument for this pool operation */
        EZFS_NAMETOOLONG,       /* dataset name is too long */
        EZFS_OPENFAILED,        /* open of device failed */
        EZFS_NOCAP,             /* couldn't get capacity */
        EZFS_LABELFAILED,       /* write of label failed */
        EZFS_BADWHO,            /* invalid permission who */
        EZFS_BADPERM,           /* invalid permission */
        EZFS_BADPERMSET,        /* invalid permission set name */
        EZFS_NODELEGATION,      /* delegated administration is disabled */
        EZFS_UNSHARESMBFAILED,  /* failed to unshare over smb */
        EZFS_SHARESMBFAILED,    /* failed to share over smb */
        EZFS_BADCACHE,          /* bad cache file */
        EZFS_ISL2CACHE,         /* device is for the level 2 ARC */
        EZFS_VDEVNOTSUP,        /* unsupported vdev type */
        EZFS_NOTSUP,            /* ops not supported on this dataset */
        EZFS_ACTIVE_SPARE,      /* pool has active shared spare devices */
        EZFS_UNPLAYED_LOGS,     /* log device has unplayed logs */
        EZFS_REFTAG_RELE,       /* snapshot release: tag not found */
        EZFS_REFTAG_HOLD,       /* snapshot hold: tag already exists */
        EZFS_TAGTOOLONG,        /* snapshot hold/rele: tag too long */
        EZFS_PIPEFAILED,        /* pipe create failed */
        EZFS_THREADCREATEFAILED, /* thread create failed */
        EZFS_POSTSPLIT_ONLINE,  /* onlining a disk after splitting it */
        EZFS_SCRUBBING,         /* currently scrubbing */
        EZFS_NO_SCRUB,          /* no active scrub */
        EZFS_DIFF,              /* general failure of zfs diff */
        EZFS_DIFFDATA,          /* bad zfs diff data */
        EZFS_POOLREADONLY,      /* pool is in read-only mode */
        EZFS_SCRUB_PAUSED,      /* scrub currently paused */
        EZFS_ACTIVE_POOL,       /* pool is imported on a different system */
        EZFS_CRYPTOFAILED,      /* failed to setup encryption */
        EZFS_NO_PENDING,        /* cannot cancel, no operation is pending */
        EZFS_CHECKPOINT_EXISTS, /* checkpoint exists */
        EZFS_DISCARDING_CHECKPOINT,     /* currently discarding a checkpoint */
        EZFS_NO_CHECKPOINT,     /* pool has no checkpoint */
        EZFS_DEVRM_IN_PROGRESS, /* a device is currently being removed */
        EZFS_VDEV_TOO_BIG,      /* a device is too big to be used */
        EZFS_IOC_NOTSUPPORTED,  /* operation not supported by zfs module */
        EZFS_TOOMANY,           /* argument list too long */
        EZFS_INITIALIZING,      /* currently initializing */
        EZFS_NO_INITIALIZE,     /* no active initialize */
        EZFS_WRONG_PARENT,      /* invalid parent dataset (e.g ZVOL) */
        EZFS_TRIMMING,          /* currently trimming */
        EZFS_NO_TRIM,           /* no active trim */
        EZFS_TRIM_NOTSUP,       /* device does not support trim */
        EZFS_NO_RESILVER_DEFER, /* pool doesn't support resilver_defer */
        EZFS_EXPORT_IN_PROGRESS,        /* currently exporting the pool */
        EZFS_REBUILDING,        /* resilvering (sequential reconstrution) */
        EZFS_VDEV_NOTSUP,       /* ops not supported for this type of vdev */
        EZFS_UNKNOWN
} zfs_error_t;

/*
 * The following data structures are all part
 * of the zfs_allow_t data structure which is
 * used for printing 'allow' permissions.
 * It is a linked list of zfs_allow_t's which
 * then contain avl tree's for user/group/sets/...
 * and each one of the entries in those trees have
 * avl tree's for the permissions they belong to and
 * whether they are local,descendent or local+descendent
 * permissions.  The AVL trees are used primarily for
 * sorting purposes, but also so that we can quickly find
 * a given user and or permission.
 */
typedef struct zfs_perm_node {
        avl_node_t z_node;
        char z_pname[MAXPATHLEN];
} zfs_perm_node_t;

typedef struct zfs_allow_node {
        avl_node_t z_node;
        char z_key[MAXPATHLEN];         /* name, such as joe */
        avl_tree_t z_localdescend;      /* local+descendent perms */
        avl_tree_t z_local;             /* local permissions */
        avl_tree_t z_descend;           /* descendent permissions */
} zfs_allow_node_t;

typedef struct zfs_allow {
        struct zfs_allow *z_next;
        char z_setpoint[MAXPATHLEN];
        avl_tree_t z_sets;
        avl_tree_t z_crperms;
        avl_tree_t z_user;
        avl_tree_t z_group;
        avl_tree_t z_everyone;
} zfs_allow_t;

/*
 * Basic handle types
 */
typedef struct zfs_handle zfs_handle_t;
typedef struct zpool_handle zpool_handle_t;
typedef struct libzfs_handle libzfs_handle_t;

_LIBZFS_H int zpool_wait(zpool_handle_t *, zpool_wait_activity_t);
_LIBZFS_H int zpool_wait_status(zpool_handle_t *, zpool_wait_activity_t,
    boolean_t *, boolean_t *);

/*
 * Library initialization
 */
_LIBZFS_H libzfs_handle_t *libzfs_init(void);
_LIBZFS_H void libzfs_fini(libzfs_handle_t *);

_LIBZFS_H libzfs_handle_t *zpool_get_handle(zpool_handle_t *);
_LIBZFS_H libzfs_handle_t *zfs_get_handle(zfs_handle_t *);

_LIBZFS_H void libzfs_print_on_error(libzfs_handle_t *, boolean_t);

_LIBZFS_H void zfs_save_arguments(int argc, char **, char *, int);
_LIBZFS_H int zpool_log_history(libzfs_handle_t *, const char *);

_LIBZFS_H int libzfs_errno(libzfs_handle_t *);
_LIBZFS_H const char *libzfs_error_init(int);
_LIBZFS_H const char *libzfs_error_action(libzfs_handle_t *);
_LIBZFS_H const char *libzfs_error_description(libzfs_handle_t *);
_LIBZFS_H int zfs_standard_error(libzfs_handle_t *, int, const char *);
_LIBZFS_H void libzfs_mnttab_init(libzfs_handle_t *);
_LIBZFS_H void libzfs_mnttab_fini(libzfs_handle_t *);
_LIBZFS_H void libzfs_mnttab_cache(libzfs_handle_t *, boolean_t);
_LIBZFS_H int libzfs_mnttab_find(libzfs_handle_t *, const char *,
    struct mnttab *);
_LIBZFS_H void libzfs_mnttab_add(libzfs_handle_t *, const char *,
    const char *, const char *);
_LIBZFS_H void libzfs_mnttab_remove(libzfs_handle_t *, const char *);

/*
 * Basic handle functions
 */
_LIBZFS_H zpool_handle_t *zpool_open(libzfs_handle_t *, const char *);
_LIBZFS_H zpool_handle_t *zpool_open_canfail(libzfs_handle_t *, const char *);
_LIBZFS_H void zpool_close(zpool_handle_t *);
_LIBZFS_H const char *zpool_get_name(zpool_handle_t *);
_LIBZFS_H int zpool_get_state(zpool_handle_t *);
_LIBZFS_H const char *zpool_state_to_name(vdev_state_t, vdev_aux_t);
_LIBZFS_H const char *zpool_pool_state_to_name(pool_state_t);
_LIBZFS_H void zpool_free_handles(libzfs_handle_t *);

/*
 * Iterate over all active pools in the system.
 */
typedef int (*zpool_iter_f)(zpool_handle_t *, void *);
_LIBZFS_H int zpool_iter(libzfs_handle_t *, zpool_iter_f, void *);
_LIBZFS_H boolean_t zpool_skip_pool(const char *);

/*
 * Functions to create and destroy pools
 */
_LIBZFS_H int zpool_create(libzfs_handle_t *, const char *, nvlist_t *,
    nvlist_t *, nvlist_t *);
_LIBZFS_H int zpool_destroy(zpool_handle_t *, const char *);
_LIBZFS_H int zpool_add(zpool_handle_t *, nvlist_t *);

typedef struct splitflags {
        /* do not split, but return the config that would be split off */
        int dryrun : 1;

        /* after splitting, import the pool */
        int import : 1;
        int name_flags;
} splitflags_t;

typedef struct trimflags {
        /* requested vdevs are for the entire pool */
        boolean_t fullpool;

        /* request a secure trim, requires support from device */
        boolean_t secure;

        /* after starting trim, block until trim completes */
        boolean_t wait;

        /* trim at the requested rate in bytes/second */
        uint64_t rate;
} trimflags_t;

/*
 * Functions to manipulate pool and vdev state
 */
_LIBZFS_H int zpool_scan(zpool_handle_t *, pool_scan_func_t, pool_scrub_cmd_t);
_LIBZFS_H int zpool_initialize(zpool_handle_t *, pool_initialize_func_t,
    nvlist_t *);
_LIBZFS_H int zpool_initialize_wait(zpool_handle_t *, pool_initialize_func_t,
    nvlist_t *);
_LIBZFS_H int zpool_trim(zpool_handle_t *, pool_trim_func_t, nvlist_t *,
    trimflags_t *);

_LIBZFS_H int zpool_clear(zpool_handle_t *, const char *, nvlist_t *);
_LIBZFS_H int zpool_reguid(zpool_handle_t *);
_LIBZFS_H int zpool_reopen_one(zpool_handle_t *, void *);

_LIBZFS_H int zpool_sync_one(zpool_handle_t *, void *);

_LIBZFS_H int zpool_vdev_online(zpool_handle_t *, const char *, int,
    vdev_state_t *);
_LIBZFS_H int zpool_vdev_offline(zpool_handle_t *, const char *, boolean_t);
_LIBZFS_H int zpool_vdev_attach(zpool_handle_t *, const char *,
    const char *, nvlist_t *, int, boolean_t);
_LIBZFS_H int zpool_vdev_detach(zpool_handle_t *, const char *);
_LIBZFS_H int zpool_vdev_remove(zpool_handle_t *, const char *);
_LIBZFS_H int zpool_vdev_remove_cancel(zpool_handle_t *);
_LIBZFS_H int zpool_vdev_indirect_size(zpool_handle_t *, const char *,
    uint64_t *);
_LIBZFS_H int zpool_vdev_split(zpool_handle_t *, char *, nvlist_t **,
    nvlist_t *, splitflags_t);

_LIBZFS_H int zpool_vdev_fault(zpool_handle_t *, uint64_t, vdev_aux_t);
_LIBZFS_H int zpool_vdev_degrade(zpool_handle_t *, uint64_t, vdev_aux_t);
_LIBZFS_H int zpool_vdev_clear(zpool_handle_t *, uint64_t);

_LIBZFS_H nvlist_t *zpool_find_vdev(zpool_handle_t *, const char *, boolean_t *,
    boolean_t *, boolean_t *);
_LIBZFS_H nvlist_t *zpool_find_vdev_by_physpath(zpool_handle_t *, const char *,
    boolean_t *, boolean_t *, boolean_t *);
_LIBZFS_H int zpool_label_disk(libzfs_handle_t *, zpool_handle_t *,
    const char *);
_LIBZFS_H uint64_t zpool_vdev_path_to_guid(zpool_handle_t *zhp,
    const char *path);

_LIBZFS_H const char *zpool_get_state_str(zpool_handle_t *);

/*
 * Functions to manage pool properties
 */
_LIBZFS_H int zpool_set_prop(zpool_handle_t *, const char *, const char *);
_LIBZFS_H int zpool_get_prop(zpool_handle_t *, zpool_prop_t, char *,
    size_t proplen, zprop_source_t *, boolean_t literal);
_LIBZFS_H uint64_t zpool_get_prop_int(zpool_handle_t *, zpool_prop_t,
    zprop_source_t *);
_LIBZFS_H int zpool_props_refresh(zpool_handle_t *);

_LIBZFS_H const char *zpool_prop_to_name(zpool_prop_t);
_LIBZFS_H const char *zpool_prop_values(zpool_prop_t);

/*
 * Functions to manage vdev properties
 */
_LIBZFS_H int zpool_get_vdev_prop_value(nvlist_t *, vdev_prop_t, char *, char *,
    size_t, zprop_source_t *, boolean_t);
_LIBZFS_H int zpool_get_vdev_prop(zpool_handle_t *, const char *, vdev_prop_t,
    char *, char *, size_t, zprop_source_t *, boolean_t);
_LIBZFS_H int zpool_get_all_vdev_props(zpool_handle_t *, const char *,
    nvlist_t **);
_LIBZFS_H int zpool_set_vdev_prop(zpool_handle_t *, const char *, const char *,
    const char *);

_LIBZFS_H const char *vdev_prop_to_name(vdev_prop_t);
_LIBZFS_H const char *vdev_prop_values(vdev_prop_t);
_LIBZFS_H boolean_t vdev_prop_user(const char *name);
_LIBZFS_H const char *vdev_prop_column_name(vdev_prop_t);
_LIBZFS_H boolean_t vdev_prop_align_right(vdev_prop_t);

/*
 * Pool health statistics.
 */
typedef enum {
        /*
         * The following correspond to faults as defined in the (fault.fs.zfs.*)
         * event namespace.  Each is associated with a corresponding message ID.
         * This must be kept in sync with the zfs_msgid_table in
         * lib/libzfs/libzfs_status.c.
         */
        ZPOOL_STATUS_CORRUPT_CACHE,     /* corrupt /kernel/drv/zpool.cache */
        ZPOOL_STATUS_MISSING_DEV_R,     /* missing device with replicas */
        ZPOOL_STATUS_MISSING_DEV_NR,    /* missing device with no replicas */
        ZPOOL_STATUS_CORRUPT_LABEL_R,   /* bad device label with replicas */
        ZPOOL_STATUS_CORRUPT_LABEL_NR,  /* bad device label with no replicas */
        ZPOOL_STATUS_BAD_GUID_SUM,      /* sum of device guids didn't match */
        ZPOOL_STATUS_CORRUPT_POOL,      /* pool metadata is corrupted */
        ZPOOL_STATUS_CORRUPT_DATA,      /* data errors in user (meta)data */
        ZPOOL_STATUS_FAILING_DEV,       /* device experiencing errors */
        ZPOOL_STATUS_VERSION_NEWER,     /* newer on-disk version */
        ZPOOL_STATUS_HOSTID_MISMATCH,   /* last accessed by another system */
        ZPOOL_STATUS_HOSTID_ACTIVE,     /* currently active on another system */
        ZPOOL_STATUS_HOSTID_REQUIRED,   /* multihost=on and hostid=0 */
        ZPOOL_STATUS_IO_FAILURE_WAIT,   /* failed I/O, failmode 'wait' */
        ZPOOL_STATUS_IO_FAILURE_CONTINUE, /* failed I/O, failmode 'continue' */
        ZPOOL_STATUS_IO_FAILURE_MMP,    /* failed MMP, failmode not 'panic' */
        ZPOOL_STATUS_BAD_LOG,           /* cannot read log chain(s) */
        ZPOOL_STATUS_ERRATA,            /* informational errata available */

        /*
         * If the pool has unsupported features but can still be opened in
         * read-only mode, its status is ZPOOL_STATUS_UNSUP_FEAT_WRITE. If the
         * pool has unsupported features but cannot be opened at all, its
         * status is ZPOOL_STATUS_UNSUP_FEAT_READ.
         */
        ZPOOL_STATUS_UNSUP_FEAT_READ,   /* unsupported features for read */
        ZPOOL_STATUS_UNSUP_FEAT_WRITE,  /* unsupported features for write */

        /*
         * These faults have no corresponding message ID.  At the time we are
         * checking the status, the original reason for the FMA fault (I/O or
         * checksum errors) has been lost.
         */
        ZPOOL_STATUS_FAULTED_DEV_R,     /* faulted device with replicas */
        ZPOOL_STATUS_FAULTED_DEV_NR,    /* faulted device with no replicas */

        /*
         * The following are not faults per se, but still an error possibly
         * requiring administrative attention.  There is no corresponding
         * message ID.
         */
        ZPOOL_STATUS_VERSION_OLDER,     /* older legacy on-disk version */
        ZPOOL_STATUS_FEAT_DISABLED,     /* supported features are disabled */
        ZPOOL_STATUS_RESILVERING,       /* device being resilvered */
        ZPOOL_STATUS_OFFLINE_DEV,       /* device offline */
        ZPOOL_STATUS_REMOVED_DEV,       /* removed device */
        ZPOOL_STATUS_REBUILDING,        /* device being rebuilt */
        ZPOOL_STATUS_REBUILD_SCRUB,     /* recommend scrubbing the pool */
        ZPOOL_STATUS_NON_NATIVE_ASHIFT, /* (e.g. 512e dev with ashift of 9) */
        ZPOOL_STATUS_COMPATIBILITY_ERR, /* bad 'compatibility' property */
        ZPOOL_STATUS_INCOMPATIBLE_FEAT, /* feature set outside compatibility */

        /*
         * Finally, the following indicates a healthy pool.
         */
        ZPOOL_STATUS_OK
} zpool_status_t;

_LIBZFS_H zpool_status_t zpool_get_status(zpool_handle_t *, char **,
    zpool_errata_t *);
_LIBZFS_H zpool_status_t zpool_import_status(nvlist_t *, char **,
    zpool_errata_t *);

/*
 * Statistics and configuration functions.
 */
_LIBZFS_H nvlist_t *zpool_get_config(zpool_handle_t *, nvlist_t **);
_LIBZFS_H nvlist_t *zpool_get_features(zpool_handle_t *);
_LIBZFS_H int zpool_refresh_stats(zpool_handle_t *, boolean_t *);
_LIBZFS_H int zpool_get_errlog(zpool_handle_t *, nvlist_t **);

/*
 * Import and export functions
 */
_LIBZFS_H int zpool_export(zpool_handle_t *, boolean_t, const char *);
_LIBZFS_H int zpool_export_force(zpool_handle_t *, const char *);
_LIBZFS_H int zpool_import(libzfs_handle_t *, nvlist_t *, const char *,
    char *altroot);
_LIBZFS_H int zpool_import_props(libzfs_handle_t *, nvlist_t *, const char *,
    nvlist_t *, int);
_LIBZFS_H void zpool_print_unsup_feat(nvlist_t *config);

/*
 * Miscellaneous pool functions
 */
struct zfs_cmd;

_LIBZFS_H const char *const zfs_history_event_names[];

typedef enum {
        VDEV_NAME_PATH          = 1 << 0,
        VDEV_NAME_GUID          = 1 << 1,
        VDEV_NAME_FOLLOW_LINKS  = 1 << 2,
        VDEV_NAME_TYPE_ID       = 1 << 3,
} vdev_name_t;

_LIBZFS_H char *zpool_vdev_name(libzfs_handle_t *, zpool_handle_t *, nvlist_t *,
    int name_flags);
_LIBZFS_H int zpool_upgrade(zpool_handle_t *, uint64_t);
_LIBZFS_H int zpool_get_history(zpool_handle_t *, nvlist_t **, uint64_t *,
    boolean_t *);
_LIBZFS_H int zpool_events_next(libzfs_handle_t *, nvlist_t **, int *, unsigned,
    int);
_LIBZFS_H int zpool_events_clear(libzfs_handle_t *, int *);
_LIBZFS_H int zpool_events_seek(libzfs_handle_t *, uint64_t, int);
_LIBZFS_H void zpool_obj_to_path_ds(zpool_handle_t *, uint64_t, uint64_t,
    char *, size_t);
_LIBZFS_H void zpool_obj_to_path(zpool_handle_t *, uint64_t, uint64_t, char *,
    size_t);
_LIBZFS_H int zfs_ioctl(libzfs_handle_t *, int, struct zfs_cmd *);
_LIBZFS_H int zpool_get_physpath(zpool_handle_t *, char *, size_t);
_LIBZFS_H void zpool_explain_recover(libzfs_handle_t *, const char *, int,
    nvlist_t *);
_LIBZFS_H int zpool_checkpoint(zpool_handle_t *);
_LIBZFS_H int zpool_discard_checkpoint(zpool_handle_t *);
_LIBZFS_H boolean_t zpool_is_draid_spare(const char *);

/*
 * Basic handle manipulations.  These functions do not create or destroy the
 * underlying datasets, only the references to them.
 */
_LIBZFS_H zfs_handle_t *zfs_open(libzfs_handle_t *, const char *, int);
_LIBZFS_H zfs_handle_t *zfs_handle_dup(zfs_handle_t *);
_LIBZFS_H void zfs_close(zfs_handle_t *);
_LIBZFS_H zfs_type_t zfs_get_type(const zfs_handle_t *);
_LIBZFS_H zfs_type_t zfs_get_underlying_type(const zfs_handle_t *);
_LIBZFS_H const char *zfs_get_name(const zfs_handle_t *);
_LIBZFS_H zpool_handle_t *zfs_get_pool_handle(const zfs_handle_t *);
_LIBZFS_H const char *zfs_get_pool_name(const zfs_handle_t *);

/*
 * Property management functions.  Some functions are shared with the kernel,
 * and are found in sys/fs/zfs.h.
 */

/*
 * zfs dataset property management
 */
_LIBZFS_H const char *zfs_prop_default_string(zfs_prop_t);
_LIBZFS_H uint64_t zfs_prop_default_numeric(zfs_prop_t);
_LIBZFS_H const char *zfs_prop_column_name(zfs_prop_t);
_LIBZFS_H boolean_t zfs_prop_align_right(zfs_prop_t);

_LIBZFS_H nvlist_t *zfs_valid_proplist(libzfs_handle_t *, zfs_type_t,
    nvlist_t *, uint64_t, zfs_handle_t *, zpool_handle_t *, boolean_t,
    const char *);

_LIBZFS_H const char *zfs_prop_to_name(zfs_prop_t);
_LIBZFS_H int zfs_prop_set(zfs_handle_t *, const char *, const char *);
_LIBZFS_H int zfs_prop_set_list(zfs_handle_t *, nvlist_t *);
_LIBZFS_H int zfs_prop_get(zfs_handle_t *, zfs_prop_t, char *, size_t,
    zprop_source_t *, char *, size_t, boolean_t);
_LIBZFS_H int zfs_prop_get_recvd(zfs_handle_t *, const char *, char *, size_t,
    boolean_t);
_LIBZFS_H int zfs_prop_get_numeric(zfs_handle_t *, zfs_prop_t, uint64_t *,
    zprop_source_t *, char *, size_t);
_LIBZFS_H int zfs_prop_get_userquota_int(zfs_handle_t *zhp,
    const char *propname, uint64_t *propvalue);
_LIBZFS_H int zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
    char *propbuf, int proplen, boolean_t literal);
_LIBZFS_H int zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
    uint64_t *propvalue);
_LIBZFS_H int zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
    char *propbuf, int proplen, boolean_t literal);
_LIBZFS_H int zfs_prop_get_feature(zfs_handle_t *zhp, const char *propname,
    char *buf, size_t len);
_LIBZFS_H uint64_t getprop_uint64(zfs_handle_t *, zfs_prop_t, char **);
_LIBZFS_H uint64_t zfs_prop_get_int(zfs_handle_t *, zfs_prop_t);
_LIBZFS_H int zfs_prop_inherit(zfs_handle_t *, const char *, boolean_t);
_LIBZFS_H const char *zfs_prop_values(zfs_prop_t);
_LIBZFS_H int zfs_prop_is_string(zfs_prop_t prop);
_LIBZFS_H nvlist_t *zfs_get_all_props(zfs_handle_t *);
_LIBZFS_H nvlist_t *zfs_get_user_props(zfs_handle_t *);
_LIBZFS_H nvlist_t *zfs_get_recvd_props(zfs_handle_t *);
_LIBZFS_H nvlist_t *zfs_get_clones_nvl(zfs_handle_t *);

_LIBZFS_H int zfs_wait_status(zfs_handle_t *, zfs_wait_activity_t,
    boolean_t *, boolean_t *);

/*
 * zfs encryption management
 */
_LIBZFS_H int zfs_crypto_get_encryption_root(zfs_handle_t *, boolean_t *,
    char *);
_LIBZFS_H int zfs_crypto_create(libzfs_handle_t *, char *, nvlist_t *,
    nvlist_t *, boolean_t stdin_available, uint8_t **, uint_t *);
_LIBZFS_H int zfs_crypto_clone_check(libzfs_handle_t *, zfs_handle_t *, char *,
    nvlist_t *);
_LIBZFS_H int zfs_crypto_attempt_load_keys(libzfs_handle_t *, const char *);
_LIBZFS_H int zfs_crypto_load_key(zfs_handle_t *, boolean_t, const char *);
_LIBZFS_H int zfs_crypto_unload_key(zfs_handle_t *);
_LIBZFS_H int zfs_crypto_rewrap(zfs_handle_t *, nvlist_t *, boolean_t);

typedef struct zprop_list {
        int             pl_prop;
        char            *pl_user_prop;
        struct zprop_list *pl_next;
        boolean_t       pl_all;
        size_t          pl_width;
        size_t          pl_recvd_width;
        boolean_t       pl_fixed;
} zprop_list_t;

_LIBZFS_H int zfs_expand_proplist(zfs_handle_t *, zprop_list_t **, boolean_t,
    boolean_t);
_LIBZFS_H void zfs_prune_proplist(zfs_handle_t *, uint8_t *);
_LIBZFS_H int vdev_expand_proplist(zpool_handle_t *, const char *,
    zprop_list_t **);

#define ZFS_MOUNTPOINT_NONE     "none"
#define ZFS_MOUNTPOINT_LEGACY   "legacy"

#define ZFS_FEATURE_DISABLED    "disabled"
#define ZFS_FEATURE_ENABLED     "enabled"
#define ZFS_FEATURE_ACTIVE      "active"

#define ZFS_UNSUPPORTED_INACTIVE        "inactive"
#define ZFS_UNSUPPORTED_READONLY        "readonly"

/*
 * zpool property management
 */
_LIBZFS_H int zpool_expand_proplist(zpool_handle_t *, zprop_list_t **,
    zfs_type_t, boolean_t);
_LIBZFS_H int zpool_prop_get_feature(zpool_handle_t *, const char *, char *,
    size_t);
_LIBZFS_H const char *zpool_prop_default_string(zpool_prop_t);
_LIBZFS_H uint64_t zpool_prop_default_numeric(zpool_prop_t);
_LIBZFS_H const char *zpool_prop_column_name(zpool_prop_t);
_LIBZFS_H boolean_t zpool_prop_align_right(zpool_prop_t);

/*
 * Functions shared by zfs and zpool property management.
 */
_LIBZFS_H int zprop_iter(zprop_func func, void *cb, boolean_t show_all,
    boolean_t ordered, zfs_type_t type);
_LIBZFS_H int zprop_get_list(libzfs_handle_t *, char *, zprop_list_t **,
    zfs_type_t);
_LIBZFS_H void zprop_free_list(zprop_list_t *);

#define ZFS_GET_NCOLS   5

typedef enum {
        GET_COL_NONE,
        GET_COL_NAME,
        GET_COL_PROPERTY,
        GET_COL_VALUE,
        GET_COL_RECVD,
        GET_COL_SOURCE
} zfs_get_column_t;

/*
 * Functions for printing zfs or zpool properties
 */
typedef struct vdev_cbdata {
        int cb_name_flags;
        char **cb_names;
        unsigned int cb_names_count;
} vdev_cbdata_t;

typedef struct zprop_get_cbdata {
        int cb_sources;
        zfs_get_column_t cb_columns[ZFS_GET_NCOLS];
        int cb_colwidths[ZFS_GET_NCOLS + 1];
        boolean_t cb_scripted;
        boolean_t cb_literal;
        boolean_t cb_first;
        zprop_list_t *cb_proplist;
        zfs_type_t cb_type;
        vdev_cbdata_t cb_vdevs;
} zprop_get_cbdata_t;

_LIBZFS_H void zprop_print_one_property(const char *, zprop_get_cbdata_t *,
    const char *, const char *, zprop_source_t, const char *,
    const char *);

/*
 * Iterator functions.
 */
typedef int (*zfs_iter_f)(zfs_handle_t *, void *);
_LIBZFS_H int zfs_iter_root(libzfs_handle_t *, zfs_iter_f, void *);
_LIBZFS_H int zfs_iter_children(zfs_handle_t *, zfs_iter_f, void *);
_LIBZFS_H int zfs_iter_dependents(zfs_handle_t *, boolean_t, zfs_iter_f,
    void *);
_LIBZFS_H int zfs_iter_filesystems(zfs_handle_t *, zfs_iter_f, void *);
_LIBZFS_H int zfs_iter_snapshots(zfs_handle_t *, boolean_t, zfs_iter_f, void *,
    uint64_t, uint64_t);
_LIBZFS_H int zfs_iter_snapshots_sorted(zfs_handle_t *, zfs_iter_f, void *,
    uint64_t, uint64_t);
_LIBZFS_H int zfs_iter_snapspec(zfs_handle_t *, const char *, zfs_iter_f,
    void *);
_LIBZFS_H int zfs_iter_bookmarks(zfs_handle_t *, zfs_iter_f, void *);
_LIBZFS_H int zfs_iter_mounted(zfs_handle_t *, zfs_iter_f, void *);

typedef struct get_all_cb {
        zfs_handle_t    **cb_handles;
        size_t          cb_alloc;
        size_t          cb_used;
} get_all_cb_t;

_LIBZFS_H void zfs_foreach_mountpoint(libzfs_handle_t *, zfs_handle_t **,
    size_t, zfs_iter_f, void *, boolean_t);
_LIBZFS_H void libzfs_add_handle(get_all_cb_t *, zfs_handle_t *);

/*
 * Functions to create and destroy datasets.
 */
_LIBZFS_H int zfs_create(libzfs_handle_t *, const char *, zfs_type_t,
    nvlist_t *);
_LIBZFS_H int zfs_create_ancestors(libzfs_handle_t *, const char *);
_LIBZFS_H int zfs_destroy(zfs_handle_t *, boolean_t);
_LIBZFS_H int zfs_destroy_snaps(zfs_handle_t *, char *, boolean_t);
_LIBZFS_H int zfs_destroy_snaps_nvl(libzfs_handle_t *, nvlist_t *, boolean_t);
_LIBZFS_H int zfs_destroy_snaps_nvl_os(libzfs_handle_t *, nvlist_t *);
_LIBZFS_H int zfs_clone(zfs_handle_t *, const char *, nvlist_t *);
_LIBZFS_H int zfs_snapshot(libzfs_handle_t *, const char *, boolean_t,
    nvlist_t *);
_LIBZFS_H int zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps,
    nvlist_t *props);
_LIBZFS_H int zfs_rollback(zfs_handle_t *, zfs_handle_t *, boolean_t);

typedef struct renameflags {
        /* recursive rename */
        int recursive : 1;

        /* don't unmount file systems */
        int nounmount : 1;

        /* force unmount file systems */
        int forceunmount : 1;
} renameflags_t;

_LIBZFS_H int zfs_rename(zfs_handle_t *, const char *, renameflags_t);

typedef struct sendflags {
        /* Amount of extra information to print. */
        int verbosity;

        /* recursive send  (ie, -R) */
        boolean_t replicate;

        /* for recursive send, skip sending missing snapshots */
        boolean_t skipmissing;

        /* for incrementals, do all intermediate snapshots */
        boolean_t doall;

        /* if dataset is a clone, do incremental from its origin */
        boolean_t fromorigin;

        /* field no longer used, maintained for backwards compatibility */
        boolean_t pad;

        /* send properties (ie, -p) */
        boolean_t props;

        /* do not send (no-op, ie. -n) */
        boolean_t dryrun;

        /* parsable verbose output (ie. -P) */
        boolean_t parsable;

        /* show progress (ie. -v) */
        boolean_t progress;

        /* large blocks (>128K) are permitted */
        boolean_t largeblock;

        /* WRITE_EMBEDDED records of type DATA are permitted */
        boolean_t embed_data;

        /* compressed WRITE records are permitted */
        boolean_t compress;

        /* raw encrypted records are permitted */
        boolean_t raw;

        /* only send received properties (ie. -b) */
        boolean_t backup;

        /* include snapshot holds in send stream */
        boolean_t holds;

        /* stream represents a partially received dataset */
        boolean_t saved;
} sendflags_t;

typedef boolean_t (snapfilter_cb_t)(zfs_handle_t *, void *);

_LIBZFS_H int zfs_send(zfs_handle_t *, const char *, const char *,
    sendflags_t *, int, snapfilter_cb_t, void *, nvlist_t **);
_LIBZFS_H int zfs_send_one(zfs_handle_t *, const char *, int, sendflags_t *,
    const char *);
_LIBZFS_H int zfs_send_progress(zfs_handle_t *, int, uint64_t *, uint64_t *);
_LIBZFS_H int zfs_send_resume(libzfs_handle_t *, sendflags_t *, int outfd,
    const char *);
_LIBZFS_H int zfs_send_saved(zfs_handle_t *, sendflags_t *, int, const char *);
_LIBZFS_H nvlist_t *zfs_send_resume_token_to_nvlist(libzfs_handle_t *hdl,
    const char *token);

_LIBZFS_H int zfs_promote(zfs_handle_t *);
_LIBZFS_H int zfs_hold(zfs_handle_t *, const char *, const char *,
    boolean_t, int);
_LIBZFS_H int zfs_hold_nvl(zfs_handle_t *, int, nvlist_t *);
_LIBZFS_H int zfs_release(zfs_handle_t *, const char *, const char *,
    boolean_t);
_LIBZFS_H int zfs_get_holds(zfs_handle_t *, nvlist_t **);
_LIBZFS_H uint64_t zvol_volsize_to_reservation(zpool_handle_t *, uint64_t,
    nvlist_t *);

typedef int (*zfs_userspace_cb_t)(void *arg, const char *domain,
    uid_t rid, uint64_t space);

_LIBZFS_H int zfs_userspace(zfs_handle_t *, zfs_userquota_prop_t,
    zfs_userspace_cb_t, void *);

_LIBZFS_H int zfs_get_fsacl(zfs_handle_t *, nvlist_t **);
_LIBZFS_H int zfs_set_fsacl(zfs_handle_t *, boolean_t, nvlist_t *);

typedef struct recvflags {
        /* print informational messages (ie, -v was specified) */
        boolean_t verbose;

        /* the destination is a prefix, not the exact fs (ie, -d) */
        boolean_t isprefix;

        /*
         * Only the tail of the sent snapshot path is appended to the
         * destination to determine the received snapshot name (ie, -e).
         */
        boolean_t istail;

        /* do not actually do the recv, just check if it would work (ie, -n) */
        boolean_t dryrun;

        /* rollback/destroy filesystems as necessary (eg, -F) */
        boolean_t force;

        /* set "canmount=off" on all modified filesystems */
        boolean_t canmountoff;

        /*
         * Mark the file systems as "resumable" and do not destroy them if the
         * receive is interrupted
         */
        boolean_t resumable;

        /* byteswap flag is used internally; callers need not specify */
        boolean_t byteswap;

        /* do not mount file systems as they are extracted (private) */
        boolean_t nomount;

        /* Was holds flag set in the compound header? */
        boolean_t holds;

        /* skip receive of snapshot holds */
        boolean_t skipholds;

        /* mount the filesystem unless nomount is specified */
        boolean_t domount;

        /* force unmount while recv snapshot (private) */
        boolean_t forceunmount;
} recvflags_t;

_LIBZFS_H int zfs_receive(libzfs_handle_t *, const char *, nvlist_t *,
    recvflags_t *, int, avl_tree_t *);

typedef enum diff_flags {
        ZFS_DIFF_PARSEABLE = 1 << 0,
        ZFS_DIFF_TIMESTAMP = 1 << 1,
        ZFS_DIFF_CLASSIFY = 1 << 2,
        ZFS_DIFF_NO_MANGLE = 1 << 3
} diff_flags_t;

_LIBZFS_H int zfs_show_diffs(zfs_handle_t *, int, const char *, const char *,
    int);

/*
 * Miscellaneous functions.
 */
_LIBZFS_H const char *zfs_type_to_name(zfs_type_t);
_LIBZFS_H void zfs_refresh_properties(zfs_handle_t *);
_LIBZFS_H int zfs_name_valid(const char *, zfs_type_t);
_LIBZFS_H zfs_handle_t *zfs_path_to_zhandle(libzfs_handle_t *, const char *,
    zfs_type_t);
_LIBZFS_H int zfs_parent_name(zfs_handle_t *, char *, size_t);
_LIBZFS_H boolean_t zfs_dataset_exists(libzfs_handle_t *, const char *,
    zfs_type_t);
_LIBZFS_H int zfs_spa_version(zfs_handle_t *, int *);
_LIBZFS_H boolean_t zfs_bookmark_exists(const char *path);

/*
 * Mount support functions.
 */
_LIBZFS_H boolean_t is_mounted(libzfs_handle_t *, const char *special, char **);
_LIBZFS_H boolean_t zfs_is_mounted(zfs_handle_t *, char **);
_LIBZFS_H int zfs_mount(zfs_handle_t *, const char *, int);
_LIBZFS_H int zfs_mount_at(zfs_handle_t *, const char *, int, const char *);
_LIBZFS_H int zfs_unmount(zfs_handle_t *, const char *, int);
_LIBZFS_H int zfs_unmountall(zfs_handle_t *, int);
_LIBZFS_H int zfs_mount_delegation_check(void);

#if defined(__linux__) || defined(__APPLE__)
_LIBZFS_H int zfs_parse_mount_options(char *mntopts, unsigned long *mntflags,
    unsigned long *zfsflags, int sloppy, char *badopt, char *mtabopt);
_LIBZFS_H void zfs_adjust_mount_options(zfs_handle_t *zhp, const char *mntpoint,
    char *mntopts, char *mtabopt);
#endif

/*
 * Share support functions.
 *
 * enum sa_protocol * lists are terminated with SA_NO_PROTOCOL,
 * NULL means "all/any known to this libzfs".
 */
#define SA_NO_PROTOCOL -1

_LIBZFS_H boolean_t zfs_is_shared(zfs_handle_t *zhp, char **where,
    const enum sa_protocol *proto);
_LIBZFS_H int zfs_share(zfs_handle_t *zhp, const enum sa_protocol *proto);
_LIBZFS_H int zfs_unshare(zfs_handle_t *zhp, const char *mountpoint,
    const enum sa_protocol *proto);
_LIBZFS_H int zfs_unshareall(zfs_handle_t *zhp,
    const enum sa_protocol *proto);
_LIBZFS_H void zfs_commit_shares(const enum sa_protocol *proto);

_LIBZFS_H int zfs_nicestrtonum(libzfs_handle_t *, const char *, uint64_t *);

/*
 * Utility functions to run an external process.
 */
#define STDOUT_VERBOSE  0x01
#define STDERR_VERBOSE  0x02
#define NO_DEFAULT_PATH 0x04 /* Don't use $PATH to lookup the command */

_LIBZFS_H int libzfs_run_process(const char *, char **, int);
_LIBZFS_H int libzfs_run_process_get_stdout(const char *, char *[], char *[],
    char **[], int *);
_LIBZFS_H int libzfs_run_process_get_stdout_nopath(const char *, char *[],
    char *[], char **[], int *);

_LIBZFS_H void libzfs_free_str_array(char **, int);

_LIBZFS_H int libzfs_envvar_is_set(char *);

/*
 * Utility functions for zfs version
 */
_LIBZFS_H const char *zfs_version_userland(void);
_LIBZFS_H char *zfs_version_kernel(void);
_LIBZFS_H int zfs_version_print(void);

/*
 * Given a device or file, determine if it is part of a pool.
 */
_LIBZFS_H int zpool_in_use(libzfs_handle_t *, int, pool_state_t *, char **,
    boolean_t *);

/*
 * Label manipulation.
 */
_LIBZFS_H int zpool_clear_label(int);
_LIBZFS_H int zpool_set_bootenv(zpool_handle_t *, const nvlist_t *);
_LIBZFS_H int zpool_get_bootenv(zpool_handle_t *, nvlist_t **);

/*
 * Management interfaces for SMB ACL files
 */

_LIBZFS_H int zfs_smb_acl_add(libzfs_handle_t *, char *, char *, char *);
_LIBZFS_H int zfs_smb_acl_remove(libzfs_handle_t *, char *, char *, char *);
_LIBZFS_H int zfs_smb_acl_purge(libzfs_handle_t *, char *, char *);
_LIBZFS_H int zfs_smb_acl_rename(libzfs_handle_t *, char *, char *, char *,
    char *);

/*
 * Enable and disable datasets within a pool by mounting/unmounting and
 * sharing/unsharing them.
 */
_LIBZFS_H int zpool_enable_datasets(zpool_handle_t *, const char *, int);
_LIBZFS_H int zpool_disable_datasets(zpool_handle_t *, boolean_t);
_LIBZFS_H void zpool_disable_datasets_os(zpool_handle_t *, boolean_t);
_LIBZFS_H void zpool_disable_volume_os(const char *);

/*
 * Parse a features file for -o compatibility
 */
typedef enum {
        ZPOOL_COMPATIBILITY_OK,
        ZPOOL_COMPATIBILITY_WARNTOKEN,
        ZPOOL_COMPATIBILITY_BADTOKEN,
        ZPOOL_COMPATIBILITY_BADFILE,
        ZPOOL_COMPATIBILITY_NOFILES
} zpool_compat_status_t;

_LIBZFS_H zpool_compat_status_t zpool_load_compat(const char *,
    boolean_t *, char *, size_t);

#ifdef __FreeBSD__

/*
 * Attach/detach the given filesystem to/from the given jail.
 */
_LIBZFS_H int zfs_jail(zfs_handle_t *zhp, int jailid, int attach);

/*
 * Set loader options for next boot.
 */
_LIBZFS_H int zpool_nextboot(libzfs_handle_t *, uint64_t, uint64_t,
    const char *);

#endif /* __FreeBSD__ */

#ifdef  __cplusplus
}
#endif

#endif  /* _LIBZFS_H */