1 /*- 2 * Copyright (c) 2014 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #ifndef AUTOFS_H 33 #define AUTOFS_H 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #define VFSTOAUTOFS(mp) ((struct autofs_mount *)((mp)->mnt_data)) 39 40 MALLOC_DECLARE(M_AUTOFS); 41 42 extern uma_zone_t autofs_request_zone; 43 extern uma_zone_t autofs_node_zone; 44 45 extern int autofs_debug; 46 extern int autofs_mount_on_stat; 47 48 #define AUTOFS_DEBUG(X, ...) \ 49 if (autofs_debug > 1) { \ 50 printf("%s: " X "\n", __func__, ## __VA_ARGS__);\ 51 } while (0) 52 53 #define AUTOFS_WARN(X, ...) \ 54 if (autofs_debug > 0) { \ 55 printf("WARNING: %s: " X "\n", \ 56 __func__, ## __VA_ARGS__); \ 57 } while (0) 58 59 #define AUTOFS_LOCK(X) sx_xlock(&X->am_lock) 60 #define AUTOFS_UNLOCK(X) sx_xunlock(&X->am_lock) 61 #define AUTOFS_ASSERT_LOCKED(X) sx_assert(&X->am_lock, SA_XLOCKED) 62 #define AUTOFS_ASSERT_UNLOCKED(X) sx_assert(&X->am_lock, SA_UNLOCKED) 63 64 struct autofs_node { 65 TAILQ_ENTRY(autofs_node) an_next; 66 char *an_name; 67 int an_fileno; 68 struct autofs_node *an_parent; 69 TAILQ_HEAD(, autofs_node) an_children; 70 struct autofs_mount *an_mount; 71 struct vnode *an_vnode; 72 struct sx an_vnode_lock; 73 bool an_cached; 74 struct callout an_callout; 75 int an_retries; 76 struct timespec an_ctime; 77 }; 78 79 struct autofs_mount { 80 TAILQ_ENTRY(autofs_mount) am_next; 81 struct autofs_softc *am_softc; 82 struct autofs_node *am_root; 83 struct mount *am_mp; 84 struct sx am_lock; 85 char am_from[MAXPATHLEN]; 86 char am_mountpoint[MAXPATHLEN]; 87 char am_options[MAXPATHLEN]; 88 char am_prefix[MAXPATHLEN]; 89 int am_last_fileno; 90 }; 91 92 struct autofs_request { 93 TAILQ_ENTRY(autofs_request) ar_next; 94 struct autofs_mount *ar_mount; 95 int ar_id; 96 bool ar_done; 97 int ar_error; 98 bool ar_in_progress; 99 char ar_from[MAXPATHLEN]; 100 char ar_path[MAXPATHLEN]; 101 char ar_prefix[MAXPATHLEN]; 102 char ar_key[MAXPATHLEN]; 103 char ar_options[MAXPATHLEN]; 104 struct callout ar_callout; 105 volatile u_int ar_refcount; 106 }; 107 108 struct autofs_softc { 109 device_t sc_dev; 110 struct cdev *sc_cdev; 111 struct cv sc_cv; 112 struct sx sc_lock; 113 TAILQ_HEAD(, autofs_request) sc_requests; 114 bool sc_dev_opened; 115 pid_t sc_dev_sid; 116 int sc_last_request_id; 117 }; 118 119 /* 120 * Limits and constants 121 */ 122 #define AUTOFS_NAMELEN 24 123 #define AUTOFS_FSNAMELEN 16 /* equal to MFSNAMELEN */ 124 #define AUTOFS_DELEN (8 + AUTOFS_NAMELEN) 125 126 int autofs_init(struct vfsconf *vfsp); 127 int autofs_uninit(struct vfsconf *vfsp); 128 int autofs_trigger(struct autofs_node *anp, const char *component, 129 int componentlen); 130 bool autofs_cached(struct autofs_node *anp, const char *component, 131 int componentlen); 132 bool autofs_ignore_thread(const struct thread *td); 133 int autofs_node_new(struct autofs_node *parent, struct autofs_mount *amp, 134 const char *name, int namelen, struct autofs_node **anpp); 135 int autofs_node_find(struct autofs_node *parent, 136 const char *name, int namelen, struct autofs_node **anpp); 137 void autofs_node_delete(struct autofs_node *anp); 138 int autofs_node_vn(struct autofs_node *anp, struct mount *mp, 139 struct vnode **vpp); 140 141 #endif /* !AUTOFS_H */ 142