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/*-
* Copyright (c) 2014 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Edward Tomasz Napierala under sponsorship
* from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef AUTOFS_H
#define AUTOFS_H
#define VFSTOAUTOFS(mp) ((struct autofs_mount *)((mp)->mnt_data))
MALLOC_DECLARE(M_AUTOFS);
extern uma_zone_t autofs_request_zone;
extern uma_zone_t autofs_node_zone;
extern int autofs_debug;
extern int autofs_mount_on_stat;
#define AUTOFS_DEBUG(X, ...) \
do { \
if (autofs_debug > 1) \
printf("%s: " X "\n", __func__, ## __VA_ARGS__);\
} while (0)
#define AUTOFS_WARN(X, ...) \
do { \
if (autofs_debug > 0) { \
printf("WARNING: %s: " X "\n", \
__func__, ## __VA_ARGS__); \
} \
} while (0)
#define AUTOFS_SLOCK(X) sx_slock(&X->am_lock)
#define AUTOFS_XLOCK(X) sx_xlock(&X->am_lock)
#define AUTOFS_SUNLOCK(X) sx_sunlock(&X->am_lock)
#define AUTOFS_XUNLOCK(X) sx_xunlock(&X->am_lock)
#define AUTOFS_ASSERT_LOCKED(X) sx_assert(&X->am_lock, SA_LOCKED)
#define AUTOFS_ASSERT_XLOCKED(X) sx_assert(&X->am_lock, SA_XLOCKED)
#define AUTOFS_ASSERT_UNLOCKED(X) sx_assert(&X->am_lock, SA_UNLOCKED)
struct autofs_node {
TAILQ_ENTRY(autofs_node) an_next;
char *an_name;
int an_fileno;
struct autofs_node *an_parent;
TAILQ_HEAD(, autofs_node) an_children;
struct autofs_mount *an_mount;
struct vnode *an_vnode;
struct sx an_vnode_lock;
bool an_cached;
bool an_wildcards;
struct callout an_callout;
int an_retries;
struct timespec an_ctime;
};
struct autofs_mount {
TAILQ_ENTRY(autofs_mount) am_next;
struct autofs_node *am_root;
struct mount *am_mp;
struct sx am_lock;
char am_from[MAXPATHLEN];
char am_mountpoint[MAXPATHLEN];
char am_options[MAXPATHLEN];
char am_prefix[MAXPATHLEN];
int am_last_fileno;
};
struct autofs_request {
TAILQ_ENTRY(autofs_request) ar_next;
struct autofs_mount *ar_mount;
int ar_id;
bool ar_done;
int ar_error;
bool ar_wildcards;
bool ar_in_progress;
char ar_from[MAXPATHLEN];
char ar_path[MAXPATHLEN];
char ar_prefix[MAXPATHLEN];
char ar_key[MAXPATHLEN];
char ar_options[MAXPATHLEN];
struct timeout_task ar_task;
volatile u_int ar_refcount;
};
struct autofs_softc {
device_t sc_dev;
struct cdev *sc_cdev;
struct cv sc_cv;
struct sx sc_lock;
TAILQ_HEAD(, autofs_request) sc_requests;
bool sc_dev_opened;
pid_t sc_dev_sid;
int sc_last_request_id;
};
/*
* Limits and constants
*/
#define AUTOFS_NAMELEN 24
#define AUTOFS_FSNAMELEN 16 /* equal to MFSNAMELEN */
#define AUTOFS_DELEN (8 + AUTOFS_NAMELEN)
int autofs_init(struct vfsconf *vfsp);
int autofs_uninit(struct vfsconf *vfsp);
int autofs_trigger(struct autofs_node *anp, const char *component,
int componentlen);
bool autofs_cached(struct autofs_node *anp, const char *component,
int componentlen);
void autofs_flush(struct autofs_mount *amp);
bool autofs_ignore_thread(const struct thread *td);
int autofs_node_new(struct autofs_node *parent, struct autofs_mount *amp,
const char *name, int namelen, struct autofs_node **anpp);
int autofs_node_find(struct autofs_node *parent,
const char *name, int namelen, struct autofs_node **anpp);
void autofs_node_delete(struct autofs_node *anp);
int autofs_node_vn(struct autofs_node *anp, struct mount *mp,
int flags, struct vnode **vpp);
#endif /* !AUTOFS_H */
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