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 #define VFSTOAUTOFS(mp) ((struct autofs_mount *)((mp)->mnt_data)) 36 37 MALLOC_DECLARE(M_AUTOFS); 38 39 extern uma_zone_t autofs_request_zone; 40 extern uma_zone_t autofs_node_zone; 41 42 extern int autofs_debug; 43 extern int autofs_mount_on_stat; 44 45 #define AUTOFS_DEBUG(X, ...) \ 46 if (autofs_debug > 1) { \ 47 printf("%s: " X "\n", __func__, ## __VA_ARGS__);\ 48 } while (0) 49 50 #define AUTOFS_WARN(X, ...) \ 51 if (autofs_debug > 0) { \ 52 printf("WARNING: %s: " X "\n", \ 53 __func__, ## __VA_ARGS__); \ 54 } while (0) 55 56 #define AUTOFS_LOCK(X) sx_xlock(&X->am_lock) 57 #define AUTOFS_UNLOCK(X) sx_xunlock(&X->am_lock) 58 #define AUTOFS_ASSERT_LOCKED(X) sx_assert(&X->am_lock, SA_XLOCKED) 59 #define AUTOFS_ASSERT_UNLOCKED(X) sx_assert(&X->am_lock, SA_UNLOCKED) 60 61 struct autofs_node { 62 TAILQ_ENTRY(autofs_node) an_next; 63 char *an_name; 64 int an_fileno; 65 struct autofs_node *an_parent; 66 TAILQ_HEAD(, autofs_node) an_children; 67 struct autofs_mount *an_mount; 68 struct vnode *an_vnode; 69 struct sx an_vnode_lock; 70 bool an_cached; 71 struct callout an_callout; 72 int an_retries; 73 struct timespec an_ctime; 74 }; 75 76 struct autofs_mount { 77 TAILQ_ENTRY(autofs_mount) am_next; 78 struct autofs_node *am_root; 79 struct mount *am_mp; 80 struct sx am_lock; 81 char am_from[MAXPATHLEN]; 82 char am_mountpoint[MAXPATHLEN]; 83 char am_options[MAXPATHLEN]; 84 char am_prefix[MAXPATHLEN]; 85 int am_last_fileno; 86 }; 87 88 struct autofs_request { 89 TAILQ_ENTRY(autofs_request) ar_next; 90 struct autofs_mount *ar_mount; 91 int ar_id; 92 bool ar_done; 93 int ar_error; 94 bool ar_in_progress; 95 char ar_from[MAXPATHLEN]; 96 char ar_path[MAXPATHLEN]; 97 char ar_prefix[MAXPATHLEN]; 98 char ar_key[MAXPATHLEN]; 99 char ar_options[MAXPATHLEN]; 100 struct callout ar_callout; 101 volatile u_int ar_refcount; 102 }; 103 104 struct autofs_softc { 105 device_t sc_dev; 106 struct cdev *sc_cdev; 107 struct cv sc_cv; 108 struct sx sc_lock; 109 TAILQ_HEAD(, autofs_request) sc_requests; 110 bool sc_dev_opened; 111 pid_t sc_dev_sid; 112 int sc_last_request_id; 113 }; 114 115 /* 116 * Limits and constants 117 */ 118 #define AUTOFS_NAMELEN 24 119 #define AUTOFS_FSNAMELEN 16 /* equal to MFSNAMELEN */ 120 #define AUTOFS_DELEN (8 + AUTOFS_NAMELEN) 121 122 int autofs_init(struct vfsconf *vfsp); 123 int autofs_uninit(struct vfsconf *vfsp); 124 int autofs_trigger(struct autofs_node *anp, const char *component, 125 int componentlen); 126 bool autofs_cached(struct autofs_node *anp, const char *component, 127 int componentlen); 128 bool autofs_ignore_thread(const struct thread *td); 129 int autofs_node_new(struct autofs_node *parent, struct autofs_mount *amp, 130 const char *name, int namelen, struct autofs_node **anpp); 131 int autofs_node_find(struct autofs_node *parent, 132 const char *name, int namelen, struct autofs_node **anpp); 133 void autofs_node_delete(struct autofs_node *anp); 134 int autofs_node_vn(struct autofs_node *anp, struct mount *mp, 135 struct vnode **vpp); 136 137 #endif /* !AUTOFS_H */ 138