nataraid(4): Add devstat support.
[dragonfly.git] / sys / net / if_mib.c
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1/*
2 * Copyright 1996 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: src/sys/net/if_mib.c,v 1.8.2.1 2000/08/03 00:09:34 ps Exp $
4986965b 30 * $DragonFly: src/sys/net/if_mib.c,v 1.7 2005/06/15 19:29:30 joerg Exp $
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31 */
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/socket.h>
37#include <sys/sysctl.h>
38
39#include <net/if.h>
40#include <net/if_mib.h>
41
42/*
43 * A sysctl(3) MIB for generic interface information. This information
44 * is exported in the net.link.generic branch, which has the following
45 * structure:
46 *
47 * net.link.generic .system - system-wide control variables
48 * and statistics (node)
49 * .ifdata.<ifindex>.general
50 * - what's in `struct ifdata'
51 * plus some other info
52 * .ifdata.<ifindex>.linkspecific
53 * - a link-type-specific data
54 * structure (as might be used
55 * by an SNMP agent
56 *
57 * Perhaps someday we will make addresses accessible via this interface
58 * as well (then there will be four such...). The reason that the
59 * index comes before the last element in the name is because it
60 * seems more orthogonal that way, particularly with the possibility
61 * of other per-interface data living down here as well (e.g., integrated
62 * services stuff).
63 */
64
65SYSCTL_DECL(_net_link_generic);
66SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system, CTLFLAG_RW, 0,
67 "Variables global to all interfaces");
68SYSCTL_INT(_net_link_generic_system, IFMIB_IFCOUNT, ifcount, CTLFLAG_RD,
69 &if_index, 0, "Number of configured interfaces");
70
71static int
72sysctl_ifdata(SYSCTL_HANDLER_ARGS) /* XXX bad syntax! */
73{
74 int *name = (int *)arg1;
4986965b 75 int error;
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76 u_int namelen = arg2;
77 struct ifnet *ifp;
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78 struct ifmibdata ifmd;
79
80 if (namelen != 2)
81 return EINVAL;
82
4986965b 83 crit_enter();
bdde688d 84 if (name[0] <= 0 || name[0] > if_index ||
7501a048 85 ifindex2ifnet[name[0]] == NULL) {
4986965b 86 crit_exit();
984263bc 87 return ENOENT;
bdde688d 88 }
7501a048
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89
90 ifp = ifindex2ifnet[name[0]];
4986965b 91 crit_exit();
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92
93 switch(name[1]) {
94 default:
95 return ENOENT;
96
97 case IFDATA_GENERAL:
8573f096 98 bzero(&ifmd, sizeof(ifmd));
3e4a09e7 99 strlcpy(ifmd.ifmd_name, ifp->if_xname, sizeof(ifmd.ifmd_name));
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100
101#define COPY(fld) ifmd.ifmd_##fld = ifp->if_##fld
102 COPY(pcount);
103 COPY(flags);
104 COPY(data);
105#undef COPY
106 ifmd.ifmd_snd_len = ifp->if_snd.ifq_len;
107 ifmd.ifmd_snd_maxlen = ifp->if_snd.ifq_maxlen;
108 ifmd.ifmd_snd_drops = ifp->if_snd.ifq_drops;
109
110 error = SYSCTL_OUT(req, &ifmd, sizeof ifmd);
111 if (error || !req->newptr)
112 return error;
113
114 error = SYSCTL_IN(req, &ifmd, sizeof ifmd);
115 if (error)
116 return error;
117
118#define DONTCOPY(fld) ifmd.ifmd_data.ifi_##fld = ifp->if_data.ifi_##fld
119 DONTCOPY(type);
120 DONTCOPY(physical);
121 DONTCOPY(addrlen);
122 DONTCOPY(hdrlen);
123 DONTCOPY(mtu);
124 DONTCOPY(metric);
125 DONTCOPY(baudrate);
126#undef DONTCOPY
127#define COPY(fld) ifp->if_##fld = ifmd.ifmd_##fld
128 COPY(data);
129 ifp->if_snd.ifq_maxlen = ifmd.ifmd_snd_maxlen;
130 ifp->if_snd.ifq_drops = ifmd.ifmd_snd_drops;
131#undef COPY
132 break;
133
134 case IFDATA_LINKSPECIFIC:
135 error = SYSCTL_OUT(req, ifp->if_linkmib, ifp->if_linkmiblen);
136 if (error || !req->newptr)
137 return error;
138
139 error = SYSCTL_IN(req, ifp->if_linkmib, ifp->if_linkmiblen);
140 if (error)
141 return error;
142
143 }
144 return 0;
145}
146
147SYSCTL_NODE(_net_link_generic, IFMIB_IFDATA, ifdata, CTLFLAG_RW,
148 sysctl_ifdata, "Interface table");
149