1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <stdio.h>
28 #include <sys/types.h>
29 #include <dirent.h>
30 #include <stdarg.h>
31 #include <stddef.h>
32 #include <stdlib.h>
33 #include <dlfcn.h>
34 #include <door.h>
35 #include <errno.h>
36 #include <fcntl.h>
37 #include <strings.h>
38 #include <unistd.h>
39 #include <synch.h>
40 #include <syslog.h>
41 #include <pthread.h>
42 #include <thread.h>
43 #include <signal.h>
44 #include <limits.h>
45 #include <locale.h>
46 #include <sys/stat.h>
47 #include <sys/systeminfo.h>
48 #include <sys/wait.h>
49 #include <sys/processor.h>
50 #include <ctype.h>
51 #include <poll.h>
52 #include <sys/wait.h>
53 #include <sys/swap.h>
54
55 #include <fpsapi.h>
56 #include "messages.h"
57 #include "fpsd.h"
58
59 /* Exported Functions */
60 void fps_door_handler(void *cookie, char *argp, size_t asize,
61 door_desc_t *dp, uint_t n_desc);
62
63 /* Used by get_free_swap() */
64 static uint64_t
ctok(int clicks)65 ctok(int clicks)
66 {
67 static int factor = -1;
68
69 if (factor == -1) factor = ((int)sysconf(_SC_PAGESIZE)) >> 10;
70 return (clicks*factor);
71 }
72
73 /* return the available free swap space in unit of MB */
74 uint64_t
get_free_swap(void)75 get_free_swap(void)
76 {
77 struct anoninfo ai;
78 unsigned freemem;
79
80 if (swapctl(SC_AINFO, &ai) != -1) {
81 /* in the unit of KB */
82 freemem = (int)(ctok(ai.ani_max) - ctok(ai.ani_resv));
83 }
84 else
85 freemem = 0;
86
87 return (freemem/1024);
88 }
89
90 /*
91 * Wait for n secs. Don't use sleep due to signal behaviours.
92 * Also be aware of poll getting interrupted.
93 */
94
95 void
fps_wait_secs(int secs)96 fps_wait_secs(int secs)
97 {
98 time_t cur = time(NULL);
99
100 if (secs <= 0)
101 return;
102
103 do {
104 if (poll(NULL, 0, secs*1000) == 0)
105 break;
106 secs -= (int)(time(NULL) - cur);
107 cur = time(NULL);
108 } while (secs > 0);
109 }
110
111 /*ARGSUSED*/
112 void
fps_door_handler(void * cookie,char * argp,size_t asize,door_desc_t * dp,uint_t n_desc)113 fps_door_handler(void *cookie, char *argp, size_t asize,
114 door_desc_t *dp, uint_t n_desc)
115 {
116 fps_event_t *evtp = NULL;
117 fps_event_reply_t reply;
118
119 reply.result = -1; /* -1 failure. 0 success */
120
121 if (argp == NULL)
122 (void) door_return((char *)&reply, sizeof (reply), NULL, 0);
123
124 /*LINTED*/
125 evtp = (fps_event_t *)argp;
126
127 if (cookie != FPS_DOOR_COOKIE)
128 (void) door_return((char *)&reply, sizeof (reply), NULL, 0);
129
130 fpsd_message(FPSD_NO_EXIT, FPS_INFO,
131 DOOR_HNDLR_MSG,
132 evtp->version, evtp->type, evtp->length);
133
134 reply.result = 0;
135 (void) door_return((char *)&reply, sizeof (reply), NULL, 0);
136
137 }
138