GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/amd/amd/srvr_afs.c Lines: 0 40 0.0 %
Date: 2017-11-13 Branches: 0 14 0.0 %

Line Branch Exec Source
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/*
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 * Copyright (c) 1989 Jan-Simon Pendry
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 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
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 * Copyright (c) 1989, 1993
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * This code is derived from software contributed to Berkeley by
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 * Jan-Simon Pendry at Imperial College, London.
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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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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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 *	from: @(#)srvr_afs.c	8.1 (Berkeley) 6/6/93
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 *	$Id: srvr_afs.c,v 1.8 2015/12/05 21:15:01 mmcc Exp $
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 */
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/*
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 * Automount FS server ("localhost") modeling
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 */
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#include "am.h"
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extern qelem afs_srvr_list;
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qelem afs_srvr_list = { &afs_srvr_list, &afs_srvr_list };
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static fserver *localhost;
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/*
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 * Find an nfs server for the local host
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 */
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fserver *
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find_afs_srvr(mntfs *mf)
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{
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	fserver *fs = localhost;
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	if (!fs) {
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		fs = ALLOC(fserver);
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		fs->fs_refc = 0;
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		fs->fs_host = strdup("localhost");
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		fs->fs_ip = 0;
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		fs->fs_cid = 0;
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		fs->fs_pinger = 0;
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		fs->fs_flags = FSF_VALID;
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		fs->fs_type = "local";
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		fs->fs_private = 0;
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		fs->fs_prfree = 0;
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		ins_que(&fs->fs_q, &afs_srvr_list);
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		srvrlog(fs, "starts up");
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		localhost = fs;
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	}
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	fs->fs_refc++;
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	return fs;
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}
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/*------------------------------------------------------------------*/
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		/* Generic routines follow */
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/*
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 * Wakeup anything waiting for this server
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 */
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void
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wakeup_srvr(fserver *fs)
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{
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	fs->fs_flags &= ~FSF_WANT;
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	wakeup(fs);
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}
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/*
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 * Called when final ttl of server has expired
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 */
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static void
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timeout_srvr(void *arg)
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{
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	fserver *fs = arg;
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	/*
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	 * If the reference count is still zero then
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	 * we are free to remove this node
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	 */
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	if (fs->fs_refc == 0) {
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#ifdef DEBUG
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		dlog("Deleting file server %s", fs->fs_host);
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#endif /* DEBUG */
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		if (fs->fs_flags & FSF_WANT)
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			wakeup_srvr(fs);
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		/*
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		 * Remove from queue.
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		 */
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		rem_que(&fs->fs_q);
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		/*
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		 * (Possibly) call the private free routine.
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		 */
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		if (fs->fs_private && fs->fs_prfree)
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			(*fs->fs_prfree)(fs->fs_private);
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		/*
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		 * Free the net address
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		 */
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		free(fs->fs_ip);
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		/*
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		 * Free the host name.
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		 */
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		free(fs->fs_host);
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		/*
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		 * Discard the fserver object.
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		 */
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		free(fs);
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	}
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}
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/*
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 * Free a file server
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 */
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void
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free_srvr(fserver *fs)
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{
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	if (--fs->fs_refc == 0) {
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		/*
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		 * The reference count is now zero,
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		 * so arrange for this node to be
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		 * removed in AM_TTL seconds if no
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		 * other mntfs is referencing it.
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		 */
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		int ttl = (fs->fs_flags & (FSF_DOWN|FSF_ERROR)) ? 19 : AM_TTL;
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#ifdef DEBUG
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		dlog("Last hard reference to file server %s - will timeout in %ds", fs->fs_host, ttl);
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#endif /* DEBUG */
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		if (fs->fs_cid) {
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			untimeout(fs->fs_cid);
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			/*
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			 * Turn off pinging - XXX
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			 */
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			fs->fs_flags &= ~FSF_PINGING;
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		}
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		/*
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		 * Keep structure lying around for a while
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		 */
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		fs->fs_cid = timeout(ttl, timeout_srvr, fs);
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		/*
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		 * Mark the fileserver down and invalid again
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		 */
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		fs->fs_flags &= ~FSF_VALID;
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		fs->fs_flags |= FSF_DOWN;
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	}
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}
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/*
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 * Make a duplicate fserver reference
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 */
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fserver *
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dup_srvr(fserver *fs)
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{
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	fs->fs_refc++;
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	return fs;
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}
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/*
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 * Log state change
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 */
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void srvrlog(fserver *fs, char *state)
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{
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	plog(XLOG_INFO, "file server %s type %s %s", fs->fs_host, fs->fs_type, state);
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}