4cdc52bdef
have wildcards. This makes it possible for autofs(4) to avoid requesting automountd(8) action on access to nonexistent nodes - unless wildcards are actually used. Note that this change breaks ABI for automountd(8). Tested by: dhw@ MFC after: 1 month Sponsored by: The FreeBSD Foundation
146 lines
4.6 KiB
C
146 lines
4.6 KiB
C
/*-
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* Copyright (c) 2014 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Edward Tomasz Napierala under sponsorship
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* from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef AUTOFS_H
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#define AUTOFS_H
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#define VFSTOAUTOFS(mp) ((struct autofs_mount *)((mp)->mnt_data))
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MALLOC_DECLARE(M_AUTOFS);
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extern uma_zone_t autofs_request_zone;
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extern uma_zone_t autofs_node_zone;
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extern int autofs_debug;
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extern int autofs_mount_on_stat;
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#define AUTOFS_DEBUG(X, ...) \
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do { \
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if (autofs_debug > 1) \
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printf("%s: " X "\n", __func__, ## __VA_ARGS__);\
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} while (0)
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#define AUTOFS_WARN(X, ...) \
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do { \
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if (autofs_debug > 0) { \
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printf("WARNING: %s: " X "\n", \
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__func__, ## __VA_ARGS__); \
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} \
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} while (0)
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#define AUTOFS_SLOCK(X) sx_slock(&X->am_lock)
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#define AUTOFS_XLOCK(X) sx_xlock(&X->am_lock)
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#define AUTOFS_SUNLOCK(X) sx_sunlock(&X->am_lock)
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#define AUTOFS_XUNLOCK(X) sx_xunlock(&X->am_lock)
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#define AUTOFS_ASSERT_LOCKED(X) sx_assert(&X->am_lock, SA_LOCKED)
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#define AUTOFS_ASSERT_XLOCKED(X) sx_assert(&X->am_lock, SA_XLOCKED)
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#define AUTOFS_ASSERT_UNLOCKED(X) sx_assert(&X->am_lock, SA_UNLOCKED)
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struct autofs_node {
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TAILQ_ENTRY(autofs_node) an_next;
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char *an_name;
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int an_fileno;
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struct autofs_node *an_parent;
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TAILQ_HEAD(, autofs_node) an_children;
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struct autofs_mount *an_mount;
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struct vnode *an_vnode;
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struct sx an_vnode_lock;
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bool an_cached;
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bool an_wildcards;
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struct callout an_callout;
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int an_retries;
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struct timespec an_ctime;
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};
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struct autofs_mount {
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TAILQ_ENTRY(autofs_mount) am_next;
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struct autofs_node *am_root;
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struct mount *am_mp;
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struct sx am_lock;
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char am_from[MAXPATHLEN];
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char am_mountpoint[MAXPATHLEN];
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char am_options[MAXPATHLEN];
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char am_prefix[MAXPATHLEN];
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int am_last_fileno;
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};
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struct autofs_request {
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TAILQ_ENTRY(autofs_request) ar_next;
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struct autofs_mount *ar_mount;
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int ar_id;
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bool ar_done;
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int ar_error;
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bool ar_wildcards;
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bool ar_in_progress;
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char ar_from[MAXPATHLEN];
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char ar_path[MAXPATHLEN];
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char ar_prefix[MAXPATHLEN];
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char ar_key[MAXPATHLEN];
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char ar_options[MAXPATHLEN];
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struct timeout_task ar_task;
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volatile u_int ar_refcount;
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};
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struct autofs_softc {
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device_t sc_dev;
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struct cdev *sc_cdev;
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struct cv sc_cv;
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struct sx sc_lock;
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TAILQ_HEAD(, autofs_request) sc_requests;
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bool sc_dev_opened;
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pid_t sc_dev_sid;
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int sc_last_request_id;
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};
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/*
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* Limits and constants
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*/
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#define AUTOFS_NAMELEN 24
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#define AUTOFS_FSNAMELEN 16 /* equal to MFSNAMELEN */
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#define AUTOFS_DELEN (8 + AUTOFS_NAMELEN)
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int autofs_init(struct vfsconf *vfsp);
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int autofs_uninit(struct vfsconf *vfsp);
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int autofs_trigger(struct autofs_node *anp, const char *component,
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int componentlen);
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bool autofs_cached(struct autofs_node *anp, const char *component,
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int componentlen);
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bool autofs_ignore_thread(const struct thread *td);
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int autofs_node_new(struct autofs_node *parent, struct autofs_mount *amp,
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const char *name, int namelen, struct autofs_node **anpp);
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int autofs_node_find(struct autofs_node *parent,
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const char *name, int namelen, struct autofs_node **anpp);
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void autofs_node_delete(struct autofs_node *anp);
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int autofs_node_vn(struct autofs_node *anp, struct mount *mp,
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int flags, struct vnode **vpp);
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#endif /* !AUTOFS_H */
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