162ec56949
Some paths through be_exists will set the error state, others will not There are multiple reasons that a call can fail, so clean it up a bit: all paths now return an appropriate error code so the caller can attempt to distinguish between a BE legitimately not existing and just having the wrong mountpoint. The caller is expected to bubble the error through to the internal error handler as needed. This fixes some unfriendliness with bectl(8)'s activate subcommand, where it might fail due to a bad mountpoint but the only message output is a generic "failed to activate" message. Approved by: re (gjb)
132 lines
5.0 KiB
C
132 lines
5.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2017 Kyle J. Kneitinger <kyle@kneit.in>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LIBBE_H
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#define _LIBBE_H
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#include <libnvpair.h>
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#include <stdbool.h>
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#define BE_MAXPATHLEN 512
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typedef struct libbe_handle libbe_handle_t;
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typedef enum be_error {
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BE_ERR_SUCCESS = 0, /* No error */
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BE_ERR_INVALIDNAME, /* invalid boot env name */
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BE_ERR_EXISTS, /* boot env name already taken */
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BE_ERR_NOENT, /* boot env doesn't exist */
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BE_ERR_PERMS, /* insufficient permissions */
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BE_ERR_DESTROYACT, /* cannot destroy active boot env */
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BE_ERR_DESTROYMNT, /* destroying a mounted be requires force */
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BE_ERR_BADPATH, /* path not suitable for operation */
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BE_ERR_PATHBUSY, /* requested path is busy */
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BE_ERR_PATHLEN, /* provided name exceeds maximum length limit */
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BE_ERR_BADMOUNT, /* mountpoint is not '/' */
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BE_ERR_NOORIGIN, /* could not open snapshot's origin */
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BE_ERR_MOUNTED, /* boot environment is already mounted */
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BE_ERR_NOMOUNT, /* boot environment is not mounted */
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BE_ERR_ZFSOPEN, /* calling zfs_open() failed */
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BE_ERR_ZFSCLONE, /* error when calling zfs_clone to create be */
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BE_ERR_IO, /* error when doing some I/O operation */
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BE_ERR_NOPOOL, /* operation not supported on this pool */
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BE_ERR_NOMEM, /* insufficient memory */
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BE_ERR_UNKNOWN, /* unknown error */
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} be_error_t;
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/* Library handling functions: be.c */
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libbe_handle_t *libbe_init(void);
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void libbe_close(libbe_handle_t *);
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/* Bootenv information functions: be_info.c */
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const char *be_active_name(libbe_handle_t *);
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const char *be_active_path(libbe_handle_t *);
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const char *be_nextboot_name(libbe_handle_t *);
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const char *be_nextboot_path(libbe_handle_t *);
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const char *be_root_path(libbe_handle_t *);
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int be_get_bootenv_props(libbe_handle_t *, nvlist_t *);
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int be_get_dataset_props(libbe_handle_t *, const char *, nvlist_t *);
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int be_get_dataset_snapshots(libbe_handle_t *, const char *, nvlist_t *);
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int be_prop_list_alloc(nvlist_t **be_list);
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void be_prop_list_free(nvlist_t *be_list);
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int be_activate(libbe_handle_t *, const char *, bool);
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/* Bootenv creation functions */
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int be_create(libbe_handle_t *, const char *);
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int be_create_from_existing(libbe_handle_t *, const char *, const char *);
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int be_create_from_existing_snap(libbe_handle_t *, const char *, const char *);
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int be_snapshot(libbe_handle_t *, const char *, const char *, bool, char *);
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/* Bootenv manipulation functions */
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int be_rename(libbe_handle_t *, const char *, const char *);
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/* Bootenv removal functions */
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typedef enum {
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BE_DESTROY_FORCE = 1 << 0,
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} be_destroy_opt_t;
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int be_destroy(libbe_handle_t *, const char *, int);
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/* Bootenv mounting functions: be_access.c */
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typedef enum {
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BE_MNT_FORCE = 1 << 0,
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BE_MNT_DEEP = 1 << 1,
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} be_mount_opt_t;
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int be_mount(libbe_handle_t *, char *, char *, int, char *);
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int be_unmount(libbe_handle_t *, char *, int);
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int be_mounted_at(libbe_handle_t *, const char *path, nvlist_t *);
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/* Error related functions: be_error.c */
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int libbe_errno(libbe_handle_t *);
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const char *libbe_error_description(libbe_handle_t *);
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void libbe_print_on_error(libbe_handle_t *, bool);
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/* Utility Functions */
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int be_root_concat(libbe_handle_t *, const char *, char *);
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int be_validate_name(libbe_handle_t * __unused, const char *);
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int be_validate_snap(libbe_handle_t *, const char *);
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int be_exists(libbe_handle_t *, char *);
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int be_export(libbe_handle_t *, const char *, int fd);
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int be_import(libbe_handle_t *, const char *, int fd);
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#if SOON
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int be_add_child(libbe_handle_t *, const char *, bool);
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#endif
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void be_nicenum(uint64_t num, char *buf, size_t buflen);
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#endif /* _LIBBE_H */
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