sharefs - zygaena/hammerhead

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#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#

#
# include global definitions
#
include ../../../Makefile.master

HDRS=	share.h	sharetab.h sharefs.h

ALLHDRS= $(HDRS)

ROOTDIRS= $(ROOT)/usr/include/sharefs

ROOTHDRS= $(ALLHDRS:%=$(ROOTDIRS)/%)

CHECKHDRS= $(HDRS:%.h=%.check)


$(ROOTDIRS)/%: %
	$(INS.file)

.KEEP_STATE:

.PARALLEL: $(CHECKHDRS)

install_h: $(ROOTDIRS) $(ROOTHDRS)

$(ROOTDIRS):
	$(INS.dir)

check:	$(CHECKHDRS)
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SHAREFS_SHARE_H
#define	_SHAREFS_SHARE_H

#ifdef __cplusplus
extern "C" {
#endif

/*
 * struct share defines the format of an exported filesystem.
 *
 * It is also the interface between the userland tools and
 * the kernel.
 */
typedef struct share {
	char		*sh_path;
	char		*sh_res;
	char		*sh_fstype;
	char		*sh_opts;
	char		*sh_descr;
	size_t		sh_size;
	struct share	*sh_next;
} share_t;

#ifdef _SYSCALL32
typedef struct share32 {
	caddr32_t	sh_path;
	caddr32_t	sh_res;
	caddr32_t	sh_fstype;
	caddr32_t	sh_opts;
	caddr32_t	sh_descr;
	size32_t	sh_size;
	caddr32_t	sh_next;
} share32_t;
#endif /* _SYSCALL32 */

#define	SHARETAB	"/etc/dfs/sharetab"
#define	MAXBUFSIZE	65536

/*
 * Flavors of the system call.
 */
enum sharefs_sys_op { SHAREFS_ADD, SHAREFS_REMOVE, SHAREFS_REPLACE };

#ifdef _KERNEL

extern int sharefs(enum sharefs_sys_op opcode, struct share *sh,
    uint32_t iMaxLen);

#else

extern int _sharefs(enum sharefs_sys_op opcode, struct share *sh);

#endif

#ifdef __cplusplus
}
#endif

#endif /* !_SHAREFS_SHARE_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 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright 2018 Nexenta Systems, Inc.
 */

#ifndef _SHAREFS_SHAREFS_H
#define	_SHAREFS_SHAREFS_H

/*
 * This header provides service for the sharefs module.
 */

#include <sys/modctl.h>
#include <sys/vfs.h>
#include <sys/vnode.h>
#include <sys/gfs.h>
#include <sharefs/share.h>
#include <sharefs/sharetab.h>

#ifdef __cplusplus
extern "C" {
#endif

#define	SHAREFS_ROOT	"/etc/dfs"
#define	SHAREFS_BASE	"sharetab"

/*
 * Lengths of strings.
 */
typedef struct sharefs_lens {
	int	shl_path;
	int	shl_res;
	int	shl_fstype;
	int	shl_opts;
	int	shl_descr;
} sharefs_lens_t;

/*
 * VFS data object
 */
typedef struct sharefs_vfs {
	vnode_t	*sharefs_vfs_root;
} sharefs_vfs_t;

#define	SHAREFS_NAME_MAX	MAXNAMELEN

typedef struct sharetab_globals {
	/*
	 * The lock ordering whenever sharefs_lock and sharetab_lock both
	 * need to be held is: sharefs_lock and then sharetab_lock.
	 */
	krwlock_t	sharefs_lock;	/* lock for the vnode ops */
	sharetab_t	*sharefs_sharetab;	/* The sharetab. */

	uint_t		sharetab_count;	/* How many shares? */
	krwlock_t	sharetab_lock;	/* lock for the cached sharetab */
	size_t		sharetab_size;	/* How big is the sharetab file? */

	timestruc_t	sharetab_mtime;	/* Last mod to sharetab */
	timestruc_t	sharetab_snap_time;	/* Last snap */
	uint_t		sharetab_generation;	/* Which copy is it? */
} sharetab_globals_t;

#define	SHAREFS_INO_FILE	0x80

extern vnode_t *sharefs_create_root_file(vfs_t *);
extern sharetab_globals_t *sharetab_get_globals(zone_t *zone);

/*
 * Sharetab file
 *
 * Note that even though the sharetab code does not explictly
 * use 'sharefs_file', it is required by GFS that the first
 * field of the private data be a gfs_file_t.
 */
typedef struct shnode_t {
	gfs_file_t	sharefs_file;		/* gfs file */
	char		*sharefs_snap;		/* snapshot of the share */
	size_t		sharefs_size;		/* size of the snapshot */
	uint_t		sharefs_count;		/* number of shares */
	uint_t		sharefs_refs;		/* reference count */
	uint_t		sharefs_real_vp;	/* Are we a real or snap */
	uint_t		sharefs_generation;	/* Which copy are we? */
	timestruc_t	sharefs_snap_time;	/* When were we modded? */
} shnode_t;

/*
 * Some conversion macros:
 */
#define	VTOSH(vp)	((shnode_t *)((vp)->v_data))

extern const fs_operation_def_t	sharefs_tops_data[];
extern vnodeops_t		*sharefs_ops_data;

extern void sharefs_data_init(void);

extern void sharefs_sharetab_init(void);

#ifdef __cplusplus
}
#endif

#endif /* !_SHAREFS_SHAREFS_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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 */

#ifndef _SHAREFS_SHARETAB_H
#define	_SHAREFS_SHARETAB_H

#include <sys/pkp_hash.h>

/*
 * This header defines the glue to keeping a sharetab in memory.
 * It is broken out from sharefs.h in the case that it will be
 * reused in userland.
 */

/*
 * Note:
 * Must include share/share.h before this header.
 */

#ifdef __cplusplus
extern "C" {
#endif

typedef struct sh_list {		/* cached share list */
	struct sh_list	*shl_next;
	share_t		*shl_sh;
} sh_list_t;

typedef struct sharefs_hash_head {
	share_t		*ssh_sh;
	uint_t		ssh_count;
} sharefs_hash_head_t;

#define	SHARETAB_HASHES		PKP_HASH_SIZE

typedef struct sharetab {
	sharefs_hash_head_t	s_buckets[SHARETAB_HASHES];
	char			*s_fstype;
	struct sharetab		*s_next;
	uint_t			s_count;
} sharetab_t;

#ifdef __cplusplus
}
#endif

#endif /* !_SHAREFS_SHARETAB_H */