1 /*- 2 * Copyright (c) 2016 Tomohiro Kusumi <kusumi.tomohiro@gmail.com> 3 * Copyright (c) 2016 The DragonFly Project 4 * Copyright (c) 2014 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Edward Tomasz Napierala under sponsorship 8 * from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34 #ifndef AUTOFS_H 35 #define AUTOFS_H 36 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/types.h> 40 #include <sys/systm.h> 41 #include <sys/malloc.h> 42 #include <sys/objcache.h> 43 #include <sys/tree.h> 44 #include <sys/lock.h> 45 #include <sys/mutex2.h> 46 #include <sys/condvar.h> 47 #include <sys/mount.h> 48 #include <sys/vnode.h> 49 #include <sys/timespec.h> 50 #include <sys/callout.h> 51 #include <sys/taskqueue.h> 52 #include <sys/conf.h> 53 #include <sys/bus.h> 54 55 #define AUTOFS_ROOTINO ((ino_t)1) 56 #define VFSTOAUTOFS(mp) ((struct autofs_mount *)((mp)->mnt_data)) 57 #define VTOI(vp) ((struct autofs_node *)((vp)->v_data)) 58 59 MALLOC_DECLARE(M_AUTOFS); 60 61 extern struct objcache *autofs_request_objcache; 62 extern struct objcache *autofs_node_objcache; 63 extern struct autofs_softc *autofs_softc; 64 extern struct dev_ops autofs_ops; 65 66 extern struct vop_ops autofs_vnode_vops; 67 68 extern int autofs_debug; 69 //extern int autofs_mount_on_stat; 70 71 #define AUTOFS_DEBUG(X, ...) \ 72 do { \ 73 if (autofs_debug > 1) \ 74 kprintf("%s: " X "\n", \ 75 __func__, ## __VA_ARGS__); \ 76 } while (0) 77 78 #define AUTOFS_WARN(X, ...) \ 79 do { \ 80 if (autofs_debug > 0) { \ 81 kprintf("WARNING: %s: " X "\n", \ 82 __func__, ## __VA_ARGS__); \ 83 } \ 84 } while (0) 85 86 #define AUTOFS_FATAL(X, ...) \ 87 kprintf("FATAL: %s: " X "\n", __func__, ## __VA_ARGS__) 88 89 /* 90 * APRINTF is only for debugging. 91 */ 92 #define APRINTF(X, ...) \ 93 kprintf("### %s(%s): " X, \ 94 __func__, curproc->p_comm, ## __VA_ARGS__) 95 96 struct autofs_node { 97 RB_ENTRY(autofs_node) an_link; 98 char *an_name; 99 ino_t an_ino; 100 struct autofs_node *an_parent; 101 RB_HEAD(autofs_node_tree, 102 autofs_node) an_children; 103 struct autofs_mount *an_mount; 104 struct vnode *an_vnode; 105 mtx_t an_vnode_lock; 106 bool an_cached; 107 bool an_wildcards; 108 struct callout an_callout; 109 int an_retries; 110 struct timespec an_ctime; 111 }; 112 113 struct autofs_mount { 114 TAILQ_ENTRY(autofs_mount) am_next; 115 struct autofs_node *am_root; 116 struct mount *am_mp; 117 mtx_t am_lock; 118 char am_from[MAXPATHLEN]; 119 char am_on[MAXPATHLEN]; 120 char am_options[MAXPATHLEN]; 121 char am_prefix[MAXPATHLEN]; 122 ino_t am_last_ino; 123 }; 124 125 struct autofs_request { 126 TAILQ_ENTRY(autofs_request) ar_next; 127 struct autofs_mount *ar_mount; 128 int ar_id; 129 bool ar_done; 130 int ar_error; 131 bool ar_wildcards; 132 bool ar_in_progress; 133 char ar_from[MAXPATHLEN]; 134 char ar_path[MAXPATHLEN]; 135 char ar_prefix[MAXPATHLEN]; 136 char ar_key[MAXPATHLEN]; 137 char ar_options[MAXPATHLEN]; 138 struct timeout_task ar_task; 139 volatile u_int ar_refcount; 140 }; 141 142 struct autofs_softc { 143 device_t sc_dev; 144 struct cdev *sc_cdev; 145 struct cv sc_cv; 146 struct lock sc_lock; 147 TAILQ_HEAD(, autofs_request) sc_requests; 148 bool sc_dev_opened; 149 pid_t sc_dev_sid; 150 int sc_last_request_id; 151 }; 152 153 int autofs_trigger(struct autofs_node *anp, const char *component, 154 int componentlen); 155 bool autofs_cached(struct autofs_node *anp, const char *component, 156 int componentlen); 157 char* autofs_path(struct autofs_node *anp); 158 void autofs_flush(struct autofs_mount *amp); 159 bool autofs_ignore_thread(void); 160 int autofs_node_new(struct autofs_node *parent, struct autofs_mount *amp, 161 const char *name, int namelen, struct autofs_node **anpp); 162 int autofs_node_find(struct autofs_node *parent, 163 const char *name, int namelen, struct autofs_node **anpp); 164 void autofs_node_delete(struct autofs_node *anp); 165 int autofs_node_vn(struct autofs_node *anp, struct mount *mp, 166 int flags, struct vnode **vpp); 167 168 static __inline void 169 autofs_node_cache(struct autofs_node *anp) 170 { 171 anp->an_cached = true; 172 } 173 174 static __inline void 175 autofs_node_uncache(struct autofs_node *anp) 176 { 177 anp->an_cached = false; 178 } 179 180 RB_PROTOTYPE(autofs_node_tree, autofs_node, an_link, autofs_node_cmp); 181 182 #endif /* !AUTOFS_H */ 183