1 /*
2 * Support for decoding of NS_* ioctl commands.
3 *
4 * Copyright (c) 2017 Nikolay Marchuk <marchuk.nikolay.a@gmail.com>
5 * Copyright (c) 2017-2018 The strace developers.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "defs.h"
32 #include "nsfs.h"
33
34 int
nsfs_ioctl(struct tcb * tcp,unsigned int code,kernel_ulong_t arg)35 nsfs_ioctl(struct tcb *tcp, unsigned int code, kernel_ulong_t arg)
36 {
37 unsigned int uid;
38 switch (code) {
39 case NS_GET_USERNS:
40 case NS_GET_PARENT:
41 return RVAL_IOCTL_DECODED | RVAL_FD;
42 case NS_GET_NSTYPE:
43 if (entering(tcp))
44 return 0;
45 if (!syserror(tcp))
46 tcp->auxstr = xlookup(setns_types, tcp->u_rval);
47 return RVAL_IOCTL_DECODED | RVAL_STR;
48 case NS_GET_OWNER_UID:
49 if (entering(tcp))
50 return 0;
51 tprints(", ");
52 if (!umove_or_printaddr(tcp, arg, &uid)) {
53 printuid("[", uid);
54 tprints("]");
55 }
56 return RVAL_IOCTL_DECODED;
57 default:
58 return RVAL_DECODED;
59 }
60 }
61