libzfs_share.h

// SPDX-License-Identifier: CDDL-1.0
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or https://opensource.org/licenses/CDDL-1.0.
 * 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.
 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2011 Gunnar Beutner
 * Copyright (c) 2019, 2022 by Delphix. All rights reserved.
 */

#ifndef _LIBZFS_SHARE_H
#define	_LIBZFS_SHARE_H

#include <sys/types.h>

/*
 * defined error values
 */
#define	SA_OK			0
#define	SA_SYSTEM_ERR		7	/* system error, use errno */
#define	SA_SYNTAX_ERR		8	/* syntax error on command line */
#define	SA_NO_MEMORY		2	/* no memory for data structures */
#define	SA_INVALID_PROTOCOL	13	/* specified protocol not valid */
#define	SA_NOT_SUPPORTED	21	/* operation not supported for proto */

/* The following errors are never returned by libshare */
#define	SA_NO_SUCH_PATH		1	/* provided path doesn't exist */
#define	SA_DUPLICATE_NAME	3	/* object name is already in use */
#define	SA_BAD_PATH		4	/* not a full path */
#define	SA_NO_SUCH_GROUP	5	/* group is not defined */
#define	SA_CONFIG_ERR		6	/* system configuration error */
#define	SA_NO_PERMISSION	9	/* no permission for operation */
#define	SA_BUSY			10	/* resource is busy */
#define	SA_NO_SUCH_PROP		11	/* property doesn't exist */
#define	SA_INVALID_NAME		12	/* name of object is invalid */
#define	SA_NOT_ALLOWED		14	/* operation not allowed */
#define	SA_BAD_VALUE		15	/* bad value for property */
#define	SA_INVALID_SECURITY	16	/* invalid security type */
#define	SA_NO_SUCH_SECURITY	17	/* security set not found */
#define	SA_VALUE_CONFLICT	18	/* property value conflict */
#define	SA_NOT_IMPLEMENTED	19	/* plugin interface not implemented */
#define	SA_INVALID_PATH		20	/* path is sub-dir of existing share */
#define	SA_PROP_SHARE_ONLY	22	/* property valid on share only */
#define	SA_NOT_SHARED		23	/* path is not shared */
#define	SA_NO_SUCH_RESOURCE	24	/* resource not found */
#define	SA_RESOURCE_REQUIRED	25	/* resource name is required  */
#define	SA_MULTIPLE_ERROR	26	/* multiple protocols reported error */
#define	SA_PATH_IS_SUBDIR	27	/* check_path found path is subdir */
#define	SA_PATH_IS_PARENTDIR	28	/* check_path found path is parent */
#define	SA_NO_SECTION		29	/* protocol requires section info */
#define	SA_NO_SUCH_SECTION	30	/* no section found */
#define	SA_NO_PROPERTIES	31	/* no properties found */
#define	SA_PASSWORD_ENC		32	/* passwords must be encrypted */
#define	SA_SHARE_EXISTS		33	/* path or file is already shared */

/* initialization */
extern const char *sa_errorstr(int);

/* lower-case */
extern const char *const sa_protocol_names[SA_PROTOCOL_COUNT];

/* share control */
extern int sa_enable_share(const char *, const char *, const char *,
    enum sa_protocol);
extern int sa_disable_share(const char *, enum sa_protocol);
extern boolean_t sa_is_shared(const char *, enum sa_protocol);
extern void sa_commit_shares(enum sa_protocol);
extern void sa_truncate_shares(enum sa_protocol);

/* protocol specific interfaces */
extern int sa_validate_shareopts(const char *, enum sa_protocol);


/* internal definitions */
typedef const struct sa_share_impl {
	const char *sa_zfsname;
	const char *sa_mountpoint;
	const char *sa_shareopts;
} *sa_share_impl_t;

typedef struct {
	int (*const enable_share)(sa_share_impl_t share);
	int (*const disable_share)(sa_share_impl_t share);
	boolean_t (*const is_shared)(sa_share_impl_t share);
	int (*const validate_shareopts)(const char *shareopts);
	int (*const commit_shares)(void);
	void (*const truncate_shares)(void);
} sa_fstype_t;

extern const sa_fstype_t libshare_nfs_type, libshare_smb_type;

/* internal NFS definitions */
#define	NFS_FILE_HEADER		"# !!! DO NOT EDIT THIS FILE MANUALLY !!!\n\n"

extern int nfs_escape_mountpoint(const char *mp, char **out,
    boolean_t *need_free);
extern boolean_t nfs_is_shared_impl(const char *exports,
    sa_share_impl_t impl_share);
extern int nfs_toggle_share(const char *lockfile, const char *exports,
    const char *expdir, sa_share_impl_t impl_share,
    int(*cbk)(sa_share_impl_t impl_share, FILE *tmpfile));
extern void nfs_reset_shares(const char *lockfile, const char *exports);

/* internal SMB definitions */
#define	SMB_NAME_MAX		255
#define	SMB_COMMENT_MAX		255

#define	SMB_SHARE_DIR		"/var/lib/samba/usershares"
#define	SMB_NET_CMD_PATH	"/usr/bin/net"
#define	SMB_NET_CMD_ARG_HOST	"127.0.0.1"

typedef struct smb_share_s {
	char name[SMB_NAME_MAX];	/* Share name */
	char path[PATH_MAX];		/* Share path */
	char comment[SMB_COMMENT_MAX];	/* Share's comment */
	boolean_t guest_ok;		/* 'y' or 'n' */

	struct smb_share_s *next;
} smb_share_t;

#endif /* _LIBZFS_SHARE_H */