206 lines
5.0 KiB
C
206 lines
5.0 KiB
C
/*
|
|
* 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
|
|
*
|
|
* $Id: srvr_afs.c,v 5.2.2.1 1992/02/09 15:09:05 jsp beta $
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* 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);
|
|
}
|