1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright (c) 1994-2001 by Sun Microsystems, Inc.
24*0Sstevel@tonic-gate * All rights reserved.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate /*
30*0Sstevel@tonic-gate * Methods of the cfsd_cache class.
31*0Sstevel@tonic-gate */
32*0Sstevel@tonic-gate
33*0Sstevel@tonic-gate #include <stdio.h>
34*0Sstevel@tonic-gate #include <stdlib.h>
35*0Sstevel@tonic-gate #include <string.h>
36*0Sstevel@tonic-gate #include <thread.h>
37*0Sstevel@tonic-gate #include <synch.h>
38*0Sstevel@tonic-gate #include <locale.h>
39*0Sstevel@tonic-gate #include <sys/utsname.h>
40*0Sstevel@tonic-gate #include <sys/stat.h>
41*0Sstevel@tonic-gate #include <mdbug/mdbug.h>
42*0Sstevel@tonic-gate #include <sys/fs/cachefs_fs.h>
43*0Sstevel@tonic-gate #include <sys/fs/cachefs_dlog.h>
44*0Sstevel@tonic-gate #include <sys/fs/cachefs_ioctl.h>
45*0Sstevel@tonic-gate #include "cfsd.h"
46*0Sstevel@tonic-gate #include "cfsd_kmod.h"
47*0Sstevel@tonic-gate #include "cfsd_maptbl.h"
48*0Sstevel@tonic-gate #include "cfsd_logfile.h"
49*0Sstevel@tonic-gate #include "cfsd_fscache.h"
50*0Sstevel@tonic-gate #include "cfsd_cache.h"
51*0Sstevel@tonic-gate
52*0Sstevel@tonic-gate /*
53*0Sstevel@tonic-gate * -----------------------------------------------------------------
54*0Sstevel@tonic-gate * cfsd_cache_create
55*0Sstevel@tonic-gate *
56*0Sstevel@tonic-gate * Description:
57*0Sstevel@tonic-gate * Arguments:
58*0Sstevel@tonic-gate * Returns:
59*0Sstevel@tonic-gate * Preconditions:
60*0Sstevel@tonic-gate */
61*0Sstevel@tonic-gate
62*0Sstevel@tonic-gate cfsd_cache_object_t *
cfsd_cache_create(void)63*0Sstevel@tonic-gate cfsd_cache_create(void)
64*0Sstevel@tonic-gate {
65*0Sstevel@tonic-gate cfsd_cache_object_t *cache_object_p;
66*0Sstevel@tonic-gate int xx;
67*0Sstevel@tonic-gate
68*0Sstevel@tonic-gate dbug_enter("cfsd_cache_create");
69*0Sstevel@tonic-gate
70*0Sstevel@tonic-gate cache_object_p = cfsd_calloc(sizeof (cfsd_cache_object_t));
71*0Sstevel@tonic-gate strlcpy(cache_object_p->i_cachedir, gettext("unknown"),
72*0Sstevel@tonic-gate sizeof (cache_object_p->i_cachedir));
73*0Sstevel@tonic-gate cache_object_p->i_refcnt = 0;
74*0Sstevel@tonic-gate cache_object_p->i_nextfscacheid = 0;
75*0Sstevel@tonic-gate cache_object_p->i_cacheid = 0;
76*0Sstevel@tonic-gate cache_object_p->i_modify = 1;
77*0Sstevel@tonic-gate cache_object_p->i_fscachelist = NULL;
78*0Sstevel@tonic-gate cache_object_p->i_fscachecount = 0;
79*0Sstevel@tonic-gate
80*0Sstevel@tonic-gate /* initialize the locking mutex */
81*0Sstevel@tonic-gate xx = mutex_init(&cache_object_p->i_lock, USYNC_THREAD, NULL);
82*0Sstevel@tonic-gate
83*0Sstevel@tonic-gate dbug_assert(xx == 0);
84*0Sstevel@tonic-gate dbug_leave("cfsd_cache_create");
85*0Sstevel@tonic-gate return (cache_object_p);
86*0Sstevel@tonic-gate }
87*0Sstevel@tonic-gate
88*0Sstevel@tonic-gate /*
89*0Sstevel@tonic-gate * -----------------------------------------------------------------
90*0Sstevel@tonic-gate * cfsd_cache_destroy
91*0Sstevel@tonic-gate *
92*0Sstevel@tonic-gate * Description:
93*0Sstevel@tonic-gate * Arguments:
94*0Sstevel@tonic-gate * Returns:
95*0Sstevel@tonic-gate * Preconditions:
96*0Sstevel@tonic-gate */
97*0Sstevel@tonic-gate
98*0Sstevel@tonic-gate
99*0Sstevel@tonic-gate void
cfsd_cache_destroy(cfsd_cache_object_t * cache_object_p)100*0Sstevel@tonic-gate cfsd_cache_destroy(cfsd_cache_object_t *cache_object_p)
101*0Sstevel@tonic-gate {
102*0Sstevel@tonic-gate
103*0Sstevel@tonic-gate cfsd_fscache_object_t *fscache_object_p;
104*0Sstevel@tonic-gate cfsd_fscache_object_t *tmp_fscache_object_p;
105*0Sstevel@tonic-gate int xx;
106*0Sstevel@tonic-gate
107*0Sstevel@tonic-gate dbug_enter("cfsd_cache_destroy");
108*0Sstevel@tonic-gate
109*0Sstevel@tonic-gate /* get rid of any fscache objects */
110*0Sstevel@tonic-gate fscache_object_p = cache_object_p->i_fscachelist;
111*0Sstevel@tonic-gate
112*0Sstevel@tonic-gate while (fscache_object_p != NULL) {
113*0Sstevel@tonic-gate tmp_fscache_object_p = fscache_object_p->i_next;
114*0Sstevel@tonic-gate cfsd_fscache_destroy(fscache_object_p);
115*0Sstevel@tonic-gate fscache_object_p = tmp_fscache_object_p;
116*0Sstevel@tonic-gate }
117*0Sstevel@tonic-gate
118*0Sstevel@tonic-gate /* destroy the locking mutex */
119*0Sstevel@tonic-gate xx = mutex_destroy(&cache_object_p->i_lock);
120*0Sstevel@tonic-gate dbug_assert(xx == 0);
121*0Sstevel@tonic-gate cfsd_free(cache_object_p);
122*0Sstevel@tonic-gate dbug_leave("cfsd_cache_destroy");
123*0Sstevel@tonic-gate }
124*0Sstevel@tonic-gate
125*0Sstevel@tonic-gate /*
126*0Sstevel@tonic-gate * -----------------------------------------------------------------
127*0Sstevel@tonic-gate * cache_setup
128*0Sstevel@tonic-gate *
129*0Sstevel@tonic-gate * Description:
130*0Sstevel@tonic-gate * Performs setup for the cache.
131*0Sstevel@tonic-gate * Arguments:
132*0Sstevel@tonic-gate * cachedirp
133*0Sstevel@tonic-gate * cacheid
134*0Sstevel@tonic-gate * Returns:
135*0Sstevel@tonic-gate * Preconditions:
136*0Sstevel@tonic-gate * precond(cachedirp)
137*0Sstevel@tonic-gate */
138*0Sstevel@tonic-gate
139*0Sstevel@tonic-gate int
cache_setup(cfsd_cache_object_t * cache_object_p,const char * cachedirp,int cacheid)140*0Sstevel@tonic-gate cache_setup(cfsd_cache_object_t *cache_object_p, const char *cachedirp,
141*0Sstevel@tonic-gate int cacheid)
142*0Sstevel@tonic-gate {
143*0Sstevel@tonic-gate
144*0Sstevel@tonic-gate /* XXX either need to prevent multiple calls to this or */
145*0Sstevel@tonic-gate /* clean up here. */
146*0Sstevel@tonic-gate
147*0Sstevel@tonic-gate int ret;
148*0Sstevel@tonic-gate struct stat64 sinfo;
149*0Sstevel@tonic-gate dbug_enter("cache_setup");
150*0Sstevel@tonic-gate
151*0Sstevel@tonic-gate if ((stat64(cachedirp, &sinfo) == -1) ||
152*0Sstevel@tonic-gate (!S_ISDIR(sinfo.st_mode)) ||
153*0Sstevel@tonic-gate (*cachedirp != '/')) {
154*0Sstevel@tonic-gate dbug_print(("info", "%s is not a cache directory", cachedirp));
155*0Sstevel@tonic-gate ret = 0;
156*0Sstevel@tonic-gate } else {
157*0Sstevel@tonic-gate strlcpy(cache_object_p->i_cachedir, cachedirp,
158*0Sstevel@tonic-gate sizeof (cache_object_p->i_cachedir));
159*0Sstevel@tonic-gate ret = 1;
160*0Sstevel@tonic-gate }
161*0Sstevel@tonic-gate
162*0Sstevel@tonic-gate cache_object_p->i_cacheid = cacheid;
163*0Sstevel@tonic-gate cache_object_p->i_modify++;
164*0Sstevel@tonic-gate
165*0Sstevel@tonic-gate dbug_leave("cache_setup");
166*0Sstevel@tonic-gate /* return result */
167*0Sstevel@tonic-gate return (ret);
168*0Sstevel@tonic-gate }
169*0Sstevel@tonic-gate /*
170*0Sstevel@tonic-gate * -----------------------------------------------------------------
171*0Sstevel@tonic-gate * cache_lock
172*0Sstevel@tonic-gate *
173*0Sstevel@tonic-gate * Description:
174*0Sstevel@tonic-gate * Arguments:
175*0Sstevel@tonic-gate * Returns:
176*0Sstevel@tonic-gate * Preconditions:
177*0Sstevel@tonic-gate */
178*0Sstevel@tonic-gate
179*0Sstevel@tonic-gate void
cache_lock(cfsd_cache_object_t * cache_object_p)180*0Sstevel@tonic-gate cache_lock(cfsd_cache_object_t *cache_object_p)
181*0Sstevel@tonic-gate {
182*0Sstevel@tonic-gate dbug_enter("cache_lock");
183*0Sstevel@tonic-gate
184*0Sstevel@tonic-gate mutex_lock(&cache_object_p->i_lock);
185*0Sstevel@tonic-gate dbug_leave("cache_lock");
186*0Sstevel@tonic-gate }
187*0Sstevel@tonic-gate
188*0Sstevel@tonic-gate /*
189*0Sstevel@tonic-gate * -----------------------------------------------------------------
190*0Sstevel@tonic-gate * cache_unlock
191*0Sstevel@tonic-gate *
192*0Sstevel@tonic-gate * Description:
193*0Sstevel@tonic-gate * Arguments:
194*0Sstevel@tonic-gate * Returns:
195*0Sstevel@tonic-gate * Preconditions:
196*0Sstevel@tonic-gate */
197*0Sstevel@tonic-gate
198*0Sstevel@tonic-gate void
cache_unlock(cfsd_cache_object_t * cache_object_p)199*0Sstevel@tonic-gate cache_unlock(cfsd_cache_object_t *cache_object_p)
200*0Sstevel@tonic-gate {
201*0Sstevel@tonic-gate dbug_enter("cache_unlock");
202*0Sstevel@tonic-gate
203*0Sstevel@tonic-gate mutex_unlock(&cache_object_p->i_lock);
204*0Sstevel@tonic-gate dbug_leave("cache_unlock");
205*0Sstevel@tonic-gate }
206*0Sstevel@tonic-gate /*
207*0Sstevel@tonic-gate * -----------------------------------------------------------------
208*0Sstevel@tonic-gate * cache_fscachelist_at
209*0Sstevel@tonic-gate *
210*0Sstevel@tonic-gate * Description:
211*0Sstevel@tonic-gate * Arguments:
212*0Sstevel@tonic-gate * index
213*0Sstevel@tonic-gate * Returns:
214*0Sstevel@tonic-gate * Returns ...
215*0Sstevel@tonic-gate * Preconditions:
216*0Sstevel@tonic-gate */
217*0Sstevel@tonic-gate
218*0Sstevel@tonic-gate cfsd_fscache_object_t *
cache_fscachelist_at(cfsd_cache_object_t * cache_object_p,size_t index)219*0Sstevel@tonic-gate cache_fscachelist_at(cfsd_cache_object_t *cache_object_p, size_t index)
220*0Sstevel@tonic-gate {
221*0Sstevel@tonic-gate cfsd_fscache_object_t *fscache_object_p;
222*0Sstevel@tonic-gate int i = 0;
223*0Sstevel@tonic-gate
224*0Sstevel@tonic-gate dbug_enter("cache_fscachelist_at");
225*0Sstevel@tonic-gate
226*0Sstevel@tonic-gate /* find the correct cache object */
227*0Sstevel@tonic-gate fscache_object_p = cache_object_p->i_fscachelist;
228*0Sstevel@tonic-gate
229*0Sstevel@tonic-gate while ((fscache_object_p != NULL) && (i++ < index)) {
230*0Sstevel@tonic-gate fscache_object_p = fscache_object_p->i_next;
231*0Sstevel@tonic-gate }
232*0Sstevel@tonic-gate
233*0Sstevel@tonic-gate dbug_leave("cache_fscachelist_at");
234*0Sstevel@tonic-gate return (fscache_object_p);
235*0Sstevel@tonic-gate }
236*0Sstevel@tonic-gate
237*0Sstevel@tonic-gate /*
238*0Sstevel@tonic-gate * -----------------------------------------------------------------
239*0Sstevel@tonic-gate * cache_fscachelist_add
240*0Sstevel@tonic-gate *
241*0Sstevel@tonic-gate * Description:
242*0Sstevel@tonic-gate * Arguments:
243*0Sstevel@tonic-gate * cachep
244*0Sstevel@tonic-gate * Returns:
245*0Sstevel@tonic-gate * Preconditions:
246*0Sstevel@tonic-gate * precond(fscachep)
247*0Sstevel@tonic-gate */
248*0Sstevel@tonic-gate
249*0Sstevel@tonic-gate void
cache_fscachelist_add(cfsd_cache_object_t * cache_object_p,cfsd_fscache_object_t * fscache_object_p)250*0Sstevel@tonic-gate cache_fscachelist_add(cfsd_cache_object_t *cache_object_p,
251*0Sstevel@tonic-gate cfsd_fscache_object_t *fscache_object_p)
252*0Sstevel@tonic-gate {
253*0Sstevel@tonic-gate dbug_enter("cache_fscachelist_add");
254*0Sstevel@tonic-gate
255*0Sstevel@tonic-gate dbug_precond(fscache_object_p);
256*0Sstevel@tonic-gate
257*0Sstevel@tonic-gate fscache_object_p->i_next = cache_object_p->i_fscachelist;
258*0Sstevel@tonic-gate cache_object_p->i_fscachelist = fscache_object_p;
259*0Sstevel@tonic-gate cache_object_p->i_modify++;
260*0Sstevel@tonic-gate cache_object_p->i_fscachecount++;
261*0Sstevel@tonic-gate dbug_leave("cache_fscachelist_add");
262*0Sstevel@tonic-gate }
263*0Sstevel@tonic-gate
264*0Sstevel@tonic-gate /*
265*0Sstevel@tonic-gate * -----------------------------------------------------------------
266*0Sstevel@tonic-gate * cache_fscachelist_find
267*0Sstevel@tonic-gate *
268*0Sstevel@tonic-gate * Description:
269*0Sstevel@tonic-gate * Arguments:
270*0Sstevel@tonic-gate * namep
271*0Sstevel@tonic-gate * Returns:
272*0Sstevel@tonic-gate * Returns ...
273*0Sstevel@tonic-gate * Preconditions:
274*0Sstevel@tonic-gate * precond(namep)
275*0Sstevel@tonic-gate */
276*0Sstevel@tonic-gate
277*0Sstevel@tonic-gate cfsd_fscache_object_t *
cache_fscachelist_find(cfsd_cache_object_t * cache_object_p,const char * namep)278*0Sstevel@tonic-gate cache_fscachelist_find(cfsd_cache_object_t *cache_object_p,
279*0Sstevel@tonic-gate const char *namep)
280*0Sstevel@tonic-gate {
281*0Sstevel@tonic-gate cfsd_fscache_object_t *fscache_object_p;
282*0Sstevel@tonic-gate
283*0Sstevel@tonic-gate dbug_enter("cache_fscachelist_find");
284*0Sstevel@tonic-gate
285*0Sstevel@tonic-gate dbug_precond(namep);
286*0Sstevel@tonic-gate
287*0Sstevel@tonic-gate /* see if the fscache exists */
288*0Sstevel@tonic-gate fscache_object_p = cache_object_p->i_fscachelist;
289*0Sstevel@tonic-gate
290*0Sstevel@tonic-gate while ((fscache_object_p != NULL) &&
291*0Sstevel@tonic-gate strcmp(namep, fscache_object_p->i_name)) {
292*0Sstevel@tonic-gate fscache_object_p = fscache_object_p->i_next;
293*0Sstevel@tonic-gate }
294*0Sstevel@tonic-gate
295*0Sstevel@tonic-gate dbug_leave("cache_fscachelist_find");
296*0Sstevel@tonic-gate return (fscache_object_p);
297*0Sstevel@tonic-gate }
298