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 do { \ 47 if (autofs_debug > 1) \ 48 printf("%s: " X "\n", __func__, ## __VA_ARGS__);\ 49 } while (0) 50 51 #define AUTOFS_WARN(X, ...) \ 52 do { \ 53 if (autofs_debug > 0) { \ 54 printf("WARNING: %s: " X "\n", \ 55 __func__, ## __VA_ARGS__); \ 56 } \ 57 } while (0) 58 59 #define AUTOFS_SLOCK(X) sx_slock(&X->am_lock) 60 #define AUTOFS_XLOCK(X) sx_xlock(&X->am_lock) 61 #define AUTOFS_SUNLOCK(X) sx_sunlock(&X->am_lock) 62 #define AUTOFS_XUNLOCK(X) sx_xunlock(&X->am_lock) 63 #define AUTOFS_ASSERT_LOCKED(X) sx_assert(&X->am_lock, SA_LOCKED) 64 #define AUTOFS_ASSERT_XLOCKED(X) sx_assert(&X->am_lock, SA_XLOCKED) 65 #define AUTOFS_ASSERT_UNLOCKED(X) sx_assert(&X->am_lock, SA_UNLOCKED) 66 67 struct autofs_node { 68 TAILQ_ENTRY(autofs_node) an_next; 69 char *an_name; 70 int an_fileno; 71 struct autofs_node *an_parent; 72 TAILQ_HEAD(, autofs_node) an_children; 73 struct autofs_mount *an_mount; 74 struct vnode *an_vnode; 75 struct sx an_vnode_lock; 76 bool an_cached; 77 struct callout an_callout; 78 int an_retries; 79 struct timespec an_ctime; 80 }; 81 82 struct autofs_mount { 83 TAILQ_ENTRY(autofs_mount) am_next; 84 struct autofs_node *am_root; 85 struct mount *am_mp; 86 struct sx am_lock; 87 char am_from[MAXPATHLEN]; 88 char am_mountpoint[MAXPATHLEN]; 89 char am_options[MAXPATHLEN]; 90 char am_prefix[MAXPATHLEN]; 91 int am_last_fileno; 92 }; 93 94 struct autofs_request { 95 TAILQ_ENTRY(autofs_request) ar_next; 96 struct autofs_mount *ar_mount; 97 int ar_id; 98 bool ar_done; 99 int ar_error; 100 bool ar_in_progress; 101 char ar_from[MAXPATHLEN]; 102 char ar_path[MAXPATHLEN]; 103 char ar_prefix[MAXPATHLEN]; 104 char ar_key[MAXPATHLEN]; 105 char ar_options[MAXPATHLEN]; 106 struct timeout_task ar_task; 107 volatile u_int ar_refcount; 108 }; 109 110 struct autofs_softc { 111 device_t sc_dev; 112 struct cdev *sc_cdev; 113 struct cv sc_cv; 114 struct sx sc_lock; 115 TAILQ_HEAD(, autofs_request) sc_requests; 116 bool sc_dev_opened; 117 pid_t sc_dev_sid; 118 int sc_last_request_id; 119 }; 120 121 /* 122 * Limits and constants 123 */ 124 #define AUTOFS_NAMELEN 24 125 #define AUTOFS_FSNAMELEN 16 /* equal to MFSNAMELEN */ 126 #define AUTOFS_DELEN (8 + AUTOFS_NAMELEN) 127 128 int autofs_init(struct vfsconf *vfsp); 129 int autofs_uninit(struct vfsconf *vfsp); 130 int autofs_trigger(struct autofs_node *anp, const char *component, 131 int componentlen); 132 bool autofs_cached(struct autofs_node *anp, const char *component, 133 int componentlen); 134 bool autofs_ignore_thread(const struct thread *td); 135 int autofs_node_new(struct autofs_node *parent, struct autofs_mount *amp, 136 const char *name, int namelen, struct autofs_node **anpp); 137 int autofs_node_find(struct autofs_node *parent, 138 const char *name, int namelen, struct autofs_node **anpp); 139 void autofs_node_delete(struct autofs_node *anp); 140 int autofs_node_vn(struct autofs_node *anp, struct mount *mp, 141 int flags, struct vnode **vpp); 142 143 #endif /* !AUTOFS_H */ 144