195 lines
5.7 KiB
C
195 lines
5.7 KiB
C
/* $NetBSD: autofs.h,v 1.4 2019/11/23 17:13:46 tkusumi Exp $ */
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/*-
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* Copyright (c) 2017 The NetBSD Foundation, Inc.
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* Copyright (c) 2016 The DragonFly Project
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* Copyright (c) 2014 The FreeBSD Foundation
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Tomohiro Kusumi <kusumi.tomohiro@gmail.com>.
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*
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* This software was developed by Edward Tomasz Napierala under sponsorship
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* from the FreeBSD Foundation.
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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 AUTHOR 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 AUTHOR 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 _SYS_FS_AUTOFS_AUTOFS_H_
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#define _SYS_FS_AUTOFS_AUTOFS_H_
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/kmem.h>
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#include <sys/tree.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/timespec.h>
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#include <sys/callout.h>
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#include <sys/workqueue.h>
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#include <sys/conf.h>
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#include <sys/proc.h>
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#include "autofs_ioctl.h"
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#define AUTOFS_ROOTINO ((ino_t)1)
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#define VFSTOAUTOFS(mp) ((struct autofs_mount *)((mp)->mnt_data))
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#define VTOI(vp) ((struct autofs_node *)((vp)->v_data))
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extern int (**autofs_vnodeop_p)(void *);
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extern const struct vnodeopv_desc autofs_vnodeop_opv_desc;
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extern struct cdevsw autofs_ops;
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extern struct pool autofs_request_pool;
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extern struct pool autofs_node_pool;
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extern struct autofs_softc *autofs_softc;
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extern struct workqueue *autofs_tmo_wq;
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extern int autofs_debug;
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extern int autofs_mount_on_stat;
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extern int autofs_timeout;
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extern int autofs_cache;
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extern int autofs_retry_attempts;
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extern int autofs_retry_delay;
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extern int autofs_interruptible;
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#define AUTOFS_DEBUG(X, ...) \
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do { \
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if (autofs_debug > 1) \
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printf("%s: " X "\n", \
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__func__, ## __VA_ARGS__); \
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} while (0)
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#define AUTOFS_WARN(X, ...) \
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do { \
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if (autofs_debug > 0) { \
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printf("WARNING: %s: " X "\n", \
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__func__, ## __VA_ARGS__); \
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} \
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} while (0)
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/*
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* APRINTF is only for debugging.
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*/
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#define APRINTF(X, ...) \
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printf("### %s(%s): " X, \
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__func__, curproc->p_comm, ## __VA_ARGS__)
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struct autofs_node {
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RB_ENTRY(autofs_node) an_entry;
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char *an_name;
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ino_t an_ino;
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struct autofs_node *an_parent;
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RB_HEAD(autofs_node_tree,
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autofs_node) an_children;
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struct autofs_mount *an_mount;
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struct vnode *an_vnode;
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bool an_cached;
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bool an_wildcards;
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struct callout an_callout;
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int an_retries;
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struct timespec an_ctime;
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};
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struct autofs_mount {
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struct autofs_node *am_root;
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struct mount *am_mp;
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kmutex_t am_lock;
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char am_from[AUTOFS_MAXPATHLEN];
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char am_on[AUTOFS_MAXPATHLEN];
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char am_options[AUTOFS_MAXPATHLEN];
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char am_prefix[AUTOFS_MAXPATHLEN];
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ino_t am_last_ino;
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};
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struct autofs_request {
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struct work ar_wk; /* must be first */
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TAILQ_ENTRY(autofs_request) ar_next;
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struct autofs_mount *ar_mount;
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int ar_id;
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bool ar_done;
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int ar_error;
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bool ar_wildcards;
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bool ar_in_progress;
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char ar_from[AUTOFS_MAXPATHLEN];
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char ar_path[AUTOFS_MAXPATHLEN];
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char ar_prefix[AUTOFS_MAXPATHLEN];
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char ar_key[AUTOFS_MAXPATHLEN];
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char ar_options[AUTOFS_MAXPATHLEN];
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struct callout ar_callout;
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volatile unsigned int ar_refcount;
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};
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struct autofs_softc {
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kcondvar_t sc_cv;
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kmutex_t sc_lock;
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TAILQ_HEAD(, autofs_request) sc_requests;
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bool sc_dev_opened;
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pid_t sc_dev_sid;
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int sc_last_request_id;
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};
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int autofs_trigger(struct autofs_node *anp, const char *component,
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int componentlen);
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bool autofs_cached(struct autofs_node *anp, const char *component,
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int componentlen);
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void autofs_flush(struct autofs_mount *amp);
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bool autofs_ignore_thread(void);
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void autofs_timeout_wq(struct work *wk, void *arg);
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int autofs_node_new(struct autofs_node *parent, struct autofs_mount *amp,
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const char *name, int namelen, struct autofs_node **anpp);
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int autofs_node_find(struct autofs_node *parent,
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const char *name, int namelen, struct autofs_node **anpp);
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void autofs_node_delete(struct autofs_node *anp);
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static __inline void
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autofs_node_cache(struct autofs_node *anp)
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{
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anp->an_cached = true;
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}
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static __inline void
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autofs_node_uncache(struct autofs_node *anp)
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{
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anp->an_cached = false;
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}
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static __inline char *
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autofs_strndup(const char *name, int nlen, km_flag_t fl)
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{
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return nlen > 0 ? kmem_strndup(name, nlen, fl) : kmem_strdup(name, fl);
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}
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RB_PROTOTYPE(autofs_node_tree, autofs_node, an_entry, autofs_node_cmp);
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#endif /* !_SYS_FS_AUTOFS_AUTOFS_H_ */
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