2 * Copyright (c) 1997-2006 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. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgment:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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40 * File: am-utils/amd/srvr_amfs_auto.c
45 * Automount FS server ("localhost") modeling
50 #endif /* HAVE_CONFIG_H */
57 static qelem amfs_auto_srvr_list = {&amfs_auto_srvr_list, &amfs_auto_srvr_list};
58 static fserver *localhost;
62 * Find an nfs server for the local host
65 amfs_generic_find_srvr(mntfs *mf)
67 fserver *fs = localhost;
70 fs = ALLOC(struct fserver);
72 fs->fs_host = strdup("localhost");
75 fs->fs_pinger = AM_PINGER;
76 fs->fs_flags = FSF_VALID | FSF_PING_UNINIT;
77 fs->fs_type = "local";
81 ins_que(&fs->fs_q, &amfs_auto_srvr_list);
83 srvrlog(fs, "starts up");
93 /*****************************************************************************
94 *** GENERIC ROUTINES FOLLOW
95 *****************************************************************************/
98 * Wakeup anything waiting for this server
101 wakeup_srvr(fserver *fs)
103 fs->fs_flags &= ~FSF_WANT;
109 * Called when final ttl of server has expired
112 timeout_srvr(voidp v)
117 * If the reference count is still zero then
118 * we are free to remove this node
120 if (fs->fs_refc == 0) {
121 dlog("Deleting file server %s", fs->fs_host);
122 if (fs->fs_flags & FSF_WANT)
130 * (Possibly) call the private free routine.
132 if (fs->fs_private && fs->fs_prfree)
133 (*fs->fs_prfree) (fs->fs_private);
136 * Free the net address
142 * Free the host name.
147 * Discard the fserver object.
158 free_srvr(fserver *fs)
160 if (--fs->fs_refc == 0) {
162 * The reference count is now zero,
163 * so arrange for this node to be
164 * removed in AM_TTL seconds if no
165 * other mntfs is referencing it.
167 int ttl = (FSRV_ERROR(fs) || FSRV_ISDOWN(fs)) ? 19 : AM_TTL;
169 dlog("Last hard reference to file server %s - will timeout in %ds", fs->fs_host, ttl);
171 untimeout(fs->fs_cid);
173 * Turn off pinging - XXX
175 fs->fs_flags &= ~FSF_PINGING;
179 * Keep structure lying around for a while
181 fs->fs_cid = timeout(ttl, timeout_srvr, (voidp) fs);
184 * Mark the fileserver down and invalid again
186 fs->fs_flags &= ~FSF_VALID;
187 fs->fs_flags |= FSF_DOWN;
193 * Make a duplicate fserver reference
196 dup_srvr(fserver *fs)
207 srvrlog(fserver *fs, char *state)
209 plog(XLOG_INFO, "file server %s, type %s, state %s", fs->fs_host, fs->fs_type, state);