1 /*-
2 * Copyright (c) 2011 Adrian Chadd, Xenion Lty Ltd
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include <sys/cdefs.h>
27 #ifdef __FreeBSD__
28 __FBSDID("$FreeBSD$");
29 #endif
30
31 /*
32 * net80211 fast-logging support, primarily for debugging.
33 *
34 * This implements a single debugging queue which includes
35 * per-device enumeration where needed.
36 */
37
38 #include "opt_wlan.h"
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/mbuf.h>
43 #include <sys/malloc.h>
44 #include <sys/endian.h>
45 #include <sys/kernel.h>
46 #include <sys/sysctl.h>
47 #include <sys/pcpu.h>
48 #include <sys/proc.h>
49 #include <sys/ucred.h>
50 #include <sys/alq.h>
51
52 #include <sys/socket.h>
53
54 #include <net/if.h>
55 #include <net/if_var.h>
56 #include <net/if_media.h>
57 #include <net/ethernet.h>
58
59 #include <net80211/ieee80211_var.h>
60 #include <net80211/ieee80211_freebsd.h>
61 #include <net80211/ieee80211_alq.h>
62
63 static struct alq *ieee80211_alq;
64 static int ieee80211_alq_lost;
65 static int ieee80211_alq_logged;
66 static char ieee80211_alq_logfile[MAXPATHLEN] = "/tmp/net80211.log";
67 static unsigned int ieee80211_alq_qsize = 64*1024;
68
69 static int
70 ieee80211_alq_setlogging(int enable)
71 {
72 int error;
73
74 if (enable) {
75 if (ieee80211_alq)
76 alq_close(ieee80211_alq);
77
78 error = alq_open(&ieee80211_alq,
79 ieee80211_alq_logfile,
80 curthread->td_ucred,
81 ALQ_DEFAULT_CMODE,
82 sizeof (struct ieee80211_alq_rec),
83 ieee80211_alq_qsize);
84 ieee80211_alq_lost = 0;
85 ieee80211_alq_logged = 0;
86 printf("net80211: logging to %s enabled; "
87 "struct size %d bytes\n",
88 ieee80211_alq_logfile,
89 sizeof(struct ieee80211_alq_rec));
90 } else {
91 if (ieee80211_alq)
92 alq_close(ieee80211_alq);
93 ieee80211_alq = NULL;
94 printf("net80211: logging disabled\n");
95 error = 0;
96 }
97 return (error);
98 }
99
100 static int
101 sysctl_ieee80211_alq_log(SYSCTL_HANDLER_ARGS)
102 {
103 int error, enable;
104
105 enable = (ieee80211_alq != NULL);
106 error = sysctl_handle_int(oidp, &enable, 0, req);
107 if (error || !req->newptr)
108 return (error);
109 else
110 return (ieee80211_alq_setlogging(enable));
111 }
112
113 SYSCTL_PROC(_net_wlan, OID_AUTO, alq, CTLTYPE_INT|CTLFLAG_RW,
114 0, 0, sysctl_ieee80211_alq_log, "I", "Enable net80211 alq logging");
115 SYSCTL_INT(_net_wlan, OID_AUTO, alq_size, CTLFLAG_RW,
116 &ieee80211_alq_qsize, 0, "In-memory log size (#records)");
117 SYSCTL_INT(_net_wlan, OID_AUTO, alq_lost, CTLFLAG_RW,
118 &ieee80211_alq_lost, 0, "Debugging operations not logged");
119 SYSCTL_INT(_net_wlan, OID_AUTO, alq_logged, CTLFLAG_RW,
120 &ieee80211_alq_logged, 0, "Debugging operations logged");
121
122 static struct ale *
123 ieee80211_alq_get(void)
124 {
125 struct ale *ale;
126
127 ale = alq_get(ieee80211_alq, ALQ_NOWAIT);
128 if (!ale)
129 ieee80211_alq_lost++;
130 else
131 ieee80211_alq_logged++;
132 return ale;
133 }
134
135 void
136 ieee80211_alq_log(struct ieee80211vap *vap, uint8_t op, u_char *p, int l)
137 {
138 struct ale *ale;
139 struct ieee80211_alq_rec *r;
140
141 if (ieee80211_alq == NULL)
142 return;
143
144 ale = ieee80211_alq_get();
145 if (! ale)
146 return;
147
148 r = (struct ieee80211_alq_rec *) ale->ae_data;
149 r->r_timestamp = htonl(ticks);
150 r->r_version = 1;
151 r->r_wlan = htons(vap->iv_ifp->if_dunit);
152 r->r_op = op;
153 r->r_threadid = htonl((uint32_t) curthread->td_tid);
154 memcpy(&r->r_payload, p, MIN(l, sizeof(r->r_payload)));
155 alq_post(ieee80211_alq, ale);
156 }
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