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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 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
* Copyright 2016 Joyent, Inc.
*/
#ifndef _LX_AUTOFS_IMPL_H
#define _LX_AUTOFS_IMPL_H
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/file.h>
#include <sys/id_space.h>
#include <sys/modhash.h>
#include <sys/vnode.h>
#include <sys/lx_autofs.h>
/*
* Space key.
* Used to persist data across lx_autofs filesystem module unloads.
*/
#define LX_AUTOFS_SPACE_KEY_UDEV LX_AUTOFS_NAME "_udev"
/*
* Name of the backing store directory.
*/
#define LX_AUTOFS_BS_DIR "." LX_AUTOFS_NAME
#define LX_AUTOFS_VFS_ID_HASH_SIZE 15
#define LX_AUTOFS_VFS_PATH_HASH_SIZE 15
#define LX_AUTOFS_VFS_VN_HASH_SIZE 15
enum lx_autofs_mnttype { LXAMT_NONE, LXAMT_INDIR, LXAMT_DIRECT, LXAMT_OFFSET };
typedef struct lx_autofs_mntent {
list_node_t lxafme_lst;
uint64_t lxafme_ts; /* time stamp */
uint_t lxafme_len;
char *lxafme_path;
} lx_autofs_mntent_t;
/*
* VFS data object.
*/
typedef struct lx_autofs_vfs {
/* Info about the underlying filesystem and backing store. */
vnode_t *lav_mvp;
char *lav_bs_name;
vnode_t *lav_bs_vp;
/* Info about the automounter process managing this filesystem. */
int lav_fd;
pid_t lav_pgrp;
file_t *lav_fifo_wr;
file_t *lav_fifo_rd;
/* The mount's dev and ino values for v5 protocol msg */
uint64_t lav_dev;
u_longlong_t lav_ino;
/* options from the mount */
enum lx_autofs_mnttype lav_mnttype;
int lav_min_proto;
/*
* ioctl-set timeout value. The automounter will perform an expire
* ioctl every timeout/4 seconds. We use this to expire a mount once
* it is inactive for the full timeout.
*/
ulong_t lav_timeout;
/* ioctl-set catatonic value (prevents future mounts). */
boolean_t lav_catatonic;
/* Mount initiator's uid/gid for recovery handling. */
uid_t lav_uid;
gid_t lav_gid;
/* Each automount requests needs a unique id. */
id_space_t *lav_ids;
/* All remaining structure members are protected by lav_lock. */
kmutex_t lav_lock;
/* openmount counter */
int lav_openmnt_cnt;
/* Hashes to keep track of outstanding automounter requests. */
mod_hash_t *lav_path_hash;
mod_hash_t *lav_id_hash;
/* We need to keep track of all our vnodes. */
vnode_t *lav_root;
mod_hash_t *lav_vn_hash;
/* list of current mounts */
list_t lav_mnt_list;
} lx_autofs_vfs_t;
enum lx_autofs_callres { LXACR_NONE, LXACR_READY, LXACR_FAIL };
/*
* Structure to keep track of automounter requests sent to user-land.
*/
typedef struct lx_autofs_automnt_req {
/* Packet that gets sent to the automounter. */
union lx_autofs_pkt laar_pkt;
int laar_pkt_size;
/* Reference count. Always updated atomically. */
uint_t laar_ref;
/*
* Fields to keep track and sync threads waiting on a lookup.
* Fields are protected by lalr_lock.
*/
kmutex_t laar_lock;
kcondvar_t laar_cv;
int laar_complete;
enum lx_autofs_callres laar_result;
} lx_autofs_automnt_req_t;
/*
* Generic stack structure.
*/
typedef struct stack_elem {
list_node_t se_list;
caddr_t se_ptr1;
caddr_t se_ptr2;
caddr_t se_ptr3;
} stack_elem_t;
#ifdef __cplusplus
}
#endif
#endif /* _LX_AUTOFS_IMPL_H */
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