1 /*
2 * Support for decoding of NS_* ioctl commands.
3 *
4 * Copyright (c) 2017 Nikolay Marchuk <marchuk.nikolay.a@gmail.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "defs.h"
31 #include "nsfs.h"
32
33 int
nsfs_ioctl(struct tcb * tcp,unsigned int code,kernel_ulong_t arg)34 nsfs_ioctl(struct tcb *tcp, unsigned int code, kernel_ulong_t arg)
35 {
36 unsigned int uid;
37 switch (code) {
38 case NS_GET_USERNS:
39 case NS_GET_PARENT:
40 return 1 + RVAL_FD + RVAL_DECODED;
41 case NS_GET_NSTYPE:
42 if (entering(tcp))
43 return 0;
44 if (!syserror(tcp)) {
45 const char *outstr;
46 outstr = xlookup(setns_types, tcp->u_rval);
47 if (outstr) {
48 tcp->auxstr = outstr;
49 return 1 + RVAL_STR;
50 }
51 }
52 return 1;
53 case NS_GET_OWNER_UID:
54 if (entering(tcp))
55 return 0;
56 tprints(", ");
57 if (!umove_or_printaddr(tcp, arg, &uid)) {
58 printuid("[", uid);
59 tprints("]");
60 }
61 return 1;
62 default:
63 return RVAL_DECODED;
64 }
65 }
66