2 * Copyright (c) 1997-2014 Erez Zadok
3 * Copyright (c) 1989 Jan-Simon Pendry
4 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1989 The Regents of the University of California.
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry at Imperial College, London.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * File: am-utils/amd/srvr_amfs_auto.c
41 * Automount FS server ("localhost") modeling
46 #endif /* HAVE_CONFIG_H */
53 static qelem amfs_auto_srvr_list = {&amfs_auto_srvr_list, &amfs_auto_srvr_list};
54 static fserver *localhost;
58 * Find an nfs server for the local host
61 amfs_generic_find_srvr(mntfs *mf)
63 fserver *fs = localhost;
66 fs = ALLOC(struct fserver);
68 fs->fs_host = xstrdup("localhost");
71 fs->fs_pinger = AM_PINGER;
72 fs->fs_flags = FSF_VALID | FSF_PING_UNINIT;
73 fs->fs_type = "local";
74 fs->fs_private = NULL;
77 ins_que(&fs->fs_q, &amfs_auto_srvr_list);
79 srvrlog(fs, "starts up");
89 /*****************************************************************************
90 *** GENERIC ROUTINES FOLLOW
91 *****************************************************************************/
94 * Wakeup anything waiting for this server
97 wakeup_srvr(fserver *fs)
99 fs->fs_flags &= ~FSF_WANT;
105 * Called when final ttl of server has expired
108 timeout_srvr(voidp v)
113 * If the reference count is still zero then
114 * we are free to remove this node
116 if (fs->fs_refc == 0) {
117 dlog("Deleting file server %s", fs->fs_host);
118 if (fs->fs_flags & FSF_WANT)
126 * (Possibly) call the private free routine.
128 if (fs->fs_private && fs->fs_prfree)
129 (*fs->fs_prfree) (fs->fs_private);
132 * Free the net address
137 * Free the host name.
142 * Discard the fserver object.
153 free_srvr(fserver *fs)
155 if (--fs->fs_refc == 0) {
157 * The reference count is now zero,
158 * so arrange for this node to be
159 * removed in AM_TTL seconds if no
160 * other mntfs is referencing it.
162 int ttl = (FSRV_ERROR(fs) || FSRV_ISDOWN(fs)) ? 19 : AM_TTL;
164 dlog("Last hard reference to file server %s - will timeout in %ds", fs->fs_host, ttl);
166 untimeout(fs->fs_cid);
168 * Turn off pinging - XXX
170 fs->fs_flags &= ~FSF_PINGING;
174 * Keep structure lying around for a while
176 fs->fs_cid = timeout(ttl, timeout_srvr, (voidp) fs);
179 * Mark the fileserver down and invalid again
181 fs->fs_flags &= ~FSF_VALID;
182 fs->fs_flags |= FSF_DOWN;
188 * Make a duplicate fserver reference
191 dup_srvr(fserver *fs)
202 srvrlog(fserver *fs, char *state)
204 plog(XLOG_INFO, "file server %s, type %s, state %s", fs->fs_host, fs->fs_type, state);