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/*
* Copyright (c) 1989 Jan-Simon Pendry
* Copyright (c) 1989 Imperial College of Science, Technology & Medicine
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)srvr_afs.c 8.1 (Berkeley) 6/6/93
*
* $FreeBSD$
*
*/
/*
* Automount FS server ("localhost") modeling
*/
#include "am.h"
extern qelem afs_srvr_list;
qelem afs_srvr_list = { &afs_srvr_list, &afs_srvr_list };
static fserver *localhost;
/*
* Find an nfs server for the local host
*/
fserver *find_afs_srvr P((mntfs *));
fserver *find_afs_srvr(mf)
mntfs *mf;
{
fserver *fs = localhost;
if (!fs) {
fs = ALLOC(fserver);
fs->fs_refc = 0;
fs->fs_host = strdup("localhost");
fs->fs_ip = 0;
fs->fs_cid = 0;
fs->fs_pinger = 0;
fs->fs_flags = FSF_VALID;
fs->fs_type = "local";
fs->fs_private = 0;
fs->fs_prfree = 0;
ins_que(&fs->fs_q, &afs_srvr_list);
srvrlog(fs, "starts up");
localhost = fs;
}
fs->fs_refc++;
return fs;
}
/*------------------------------------------------------------------*/
/* Generic routines follow */
/*
* Wakeup anything waiting for this server
*/
void wakeup_srvr P((fserver *fs));
void wakeup_srvr(fs)
fserver *fs;
{
fs->fs_flags &= ~FSF_WANT;
wakeup((voidp) fs);
}
/*
* Called when final ttl of server has expired
*/
static void timeout_srvr P((fserver *fs));
static void timeout_srvr(fs)
fserver *fs;
{
/*
* If the reference count is still zero then
* we are free to remove this node
*/
if (fs->fs_refc == 0) {
#ifdef DEBUG
dlog("Deleting file server %s", fs->fs_host);
#endif /* DEBUG */
if (fs->fs_flags & FSF_WANT)
wakeup_srvr(fs);
/*
* Remove from queue.
*/
rem_que(&fs->fs_q);
/*
* (Possibly) call the private free routine.
*/
if (fs->fs_private && fs->fs_prfree)
(*fs->fs_prfree)(fs->fs_private);
/*
* Free the net address
*/
if (fs->fs_ip)
free((voidp) fs->fs_ip);
/*
* Free the host name.
*/
free((voidp) fs->fs_host);
/*
* Discard the fserver object.
*/
free((voidp) fs);
}
}
/*
* Free a file server
*/
void free_srvr P((fserver *fs));
void free_srvr(fs)
fserver *fs;
{
if (--fs->fs_refc == 0) {
/*
* The reference count is now zero,
* so arrange for this node to be
* removed in AM_TTL seconds if no
* other mntfs is referencing it.
*/
int ttl = (fs->fs_flags & (FSF_DOWN|FSF_ERROR)) ? 19 : AM_TTL;
#ifdef DEBUG
dlog("Last hard reference to file server %s - will timeout in %ds", fs->fs_host, ttl);
#endif /* DEBUG */
if (fs->fs_cid) {
untimeout(fs->fs_cid);
/*
* Turn off pinging - XXX
*/
fs->fs_flags &= ~FSF_PINGING;
}
/*
* Keep structure lying around for a while
*/
fs->fs_cid = timeout(ttl, timeout_srvr, (voidp) fs);
/*
* Mark the fileserver down and invalid again
*/
fs->fs_flags &= ~FSF_VALID;
fs->fs_flags |= FSF_DOWN;
}
}
/*
* Make a duplicate fserver reference
*/
fserver *dup_srvr P((fserver *fs));
fserver *dup_srvr(fs)
fserver *fs;
{
fs->fs_refc++;
return fs;
}
/*
* Log state change
*/
void srvrlog P((fserver *fs, char *state));
void srvrlog(fs, state)
fserver *fs;
char *state;
{
plog(XLOG_INFO, "file server %s type %s %s", fs->fs_host, fs->fs_type, state);
}
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