2 * Copyright (c) 2016 The DragonFly Project
3 * Copyright (c) 2014 The FreeBSD Foundation
6 * This software was developed by Edward Tomasz Napierala under sponsorship
7 * from the FreeBSD Foundation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include <sys/kernel.h>
37 #include <sys/module.h>
38 #include <sys/types.h>
39 #include <sys/systm.h>
40 #include <sys/malloc.h>
41 #include <sys/objcache.h>
44 #include <sys/mutex2.h>
45 #include <sys/condvar.h>
46 #include <sys/mount.h>
47 #include <sys/vnode.h>
48 #include <sys/timespec.h>
49 #include <sys/callout.h>
50 #include <sys/taskqueue.h>
54 #define AUTOFS_ROOTINO ((ino_t)1)
55 #define VFSTOAUTOFS(mp) ((struct autofs_mount *)((mp)->mnt_data))
56 #define VTOI(vp) ((struct autofs_node *)((vp)->v_data))
58 MALLOC_DECLARE(M_AUTOFS);
60 extern struct objcache *autofs_request_objcache;
61 extern struct objcache *autofs_node_objcache;
63 extern struct vop_ops autofs_vnode_vops;
65 extern int autofs_debug;
66 extern int autofs_mount_on_stat;
68 #define AUTOFS_DEBUG(X, ...) \
70 if (autofs_debug > 1) \
71 kprintf("%s: " X "\n", \
72 __func__, ## __VA_ARGS__); \
75 #define AUTOFS_WARN(X, ...) \
77 if (autofs_debug > 0) { \
78 kprintf("WARNING: %s: " X "\n", \
79 __func__, ## __VA_ARGS__); \
83 #define AUTOFS_FATAL(X, ...) \
84 kprintf("FATAL: %s: " X "\n", __func__, ## __VA_ARGS__)
87 * APRINTF is only for debugging.
89 #define APRINTF(X, ...) \
90 kprintf("### %s(%s): " X, \
91 __func__, curproc->p_comm, ## __VA_ARGS__)
93 #define AUTOFS_ASSERT_LOCKED(X) \
94 KKASSERT(mtx_islocked(&(X)->am_lock))
95 #define AUTOFS_ASSERT_XLOCKED(X) \
96 KKASSERT(mtx_islocked_ex(&(X)->am_lock))
97 #define AUTOFS_ASSERT_UNLOCKED(X) \
98 KKASSERT(mtx_notlocked(&(X)->am_lock))
101 RB_ENTRY(autofs_node) an_link;
104 struct autofs_node *an_parent;
105 RB_HEAD(autofs_node_tree,
106 autofs_node) an_children;
107 struct autofs_mount *an_mount;
108 struct vnode *an_vnode;
112 struct callout an_callout;
114 struct timespec an_ctime;
117 struct autofs_mount {
118 TAILQ_ENTRY(autofs_mount) am_next;
119 struct autofs_node *am_root;
122 char am_from[MAXPATHLEN];
123 char am_on[MAXPATHLEN];
124 char am_options[MAXPATHLEN];
125 char am_prefix[MAXPATHLEN];
129 struct autofs_request {
130 TAILQ_ENTRY(autofs_request) ar_next;
131 struct autofs_mount *ar_mount;
137 char ar_from[MAXPATHLEN];
138 char ar_path[MAXPATHLEN];
139 char ar_prefix[MAXPATHLEN];
140 char ar_key[MAXPATHLEN];
141 char ar_options[MAXPATHLEN];
142 struct timeout_task ar_task;
143 volatile u_int ar_refcount;
146 struct autofs_softc {
148 struct cdev *sc_cdev;
151 TAILQ_HEAD(, autofs_request) sc_requests;
154 int sc_last_request_id;
157 int autofs_init(struct vfsconf *vfsp);
158 int autofs_uninit(struct vfsconf *vfsp);
159 int autofs_trigger(struct autofs_node *anp, const char *component,
161 bool autofs_cached(struct autofs_node *anp, const char *component,
163 char* autofs_path(struct autofs_node *anp);
164 void autofs_flush(struct autofs_mount *amp);
165 bool autofs_ignore_thread(void);
166 int autofs_node_new(struct autofs_node *parent, struct autofs_mount *amp,
167 const char *name, int namelen, struct autofs_node **anpp);
168 int autofs_node_find(struct autofs_node *parent,
169 const char *name, int namelen, struct autofs_node **anpp);
170 void autofs_node_delete(struct autofs_node *anp);
171 int autofs_node_vn(struct autofs_node *anp, struct mount *mp,
172 int flags, struct vnode **vpp);
175 autofs_node_cache(struct autofs_node *anp)
177 anp->an_cached = true;
181 autofs_node_uncache(struct autofs_node *anp)
183 anp->an_cached = false;
186 RB_PROTOTYPE(autofs_node_tree, autofs_node, an_link, autofs_node_cmp);
188 #endif /* !AUTOFS_H */