Branch data Line data Source code
1 : : /*
2 : : * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 : : * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 : : * Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
5 : : * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 : : * Copyright (c) 2005 Roland McGrath <roland@redhat.com>
7 : : * Copyright (c) 2007-2015 Dmitry V. Levin <ldv@altlinux.org>
8 : : * Copyright (c) 2014-2017 The strace developers.
9 : : * All rights reserved.
10 : : *
11 : : * Redistribution and use in source and binary forms, with or without
12 : : * modification, are permitted provided that the following conditions
13 : : * are met:
14 : : * 1. Redistributions of source code must retain the above copyright
15 : : * notice, this list of conditions and the following disclaimer.
16 : : * 2. Redistributions in binary form must reproduce the above copyright
17 : : * notice, this list of conditions and the following disclaimer in the
18 : : * documentation and/or other materials provided with the distribution.
19 : : * 3. The name of the author may not be used to endorse or promote products
20 : : * derived from this software without specific prior written permission.
21 : : *
22 : : * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 : : * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 : : * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 : : * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 : : * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 : : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 : : * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 : : * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 : : * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 : : * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 : : */
33 : :
34 : : #include "defs.h"
35 : :
36 : : #define MS_MGC_VAL 0xc0ed0000 /* old magic mount flag number */
37 : : #define MS_MGC_MSK 0xffff0000 /* old magic mount flag mask */
38 : :
39 : : #include "xlat/mount_flags.h"
40 : :
41 : 12 : SYS_FUNC(mount)
42 : : {
43 : 12 : bool ignore_type = false;
44 : 12 : bool ignore_data = false;
45 : 12 : bool old_magic = false;
46 : 12 : kernel_ulong_t flags = tcp->u_arg[3];
47 : :
48 : : /* Discard magic */
49 [ + + ]: 12 : if ((flags & MS_MGC_MSK) == MS_MGC_VAL) {
50 : 4 : flags &= ~MS_MGC_MSK;
51 : 4 : old_magic = true;
52 : : }
53 : :
54 [ + + ]: 12 : if (flags & MS_REMOUNT)
55 : : ignore_type = true;
56 [ + + ]: 10 : else if (flags & (MS_BIND | MS_MOVE | MS_SHARED
57 : : | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
58 : 2 : ignore_type = ignore_data = true;
59 : :
60 : 12 : printpath(tcp, tcp->u_arg[0]);
61 : 12 : tprints(", ");
62 : :
63 : 12 : printpath(tcp, tcp->u_arg[1]);
64 : 12 : tprints(", ");
65 : :
66 [ + + ]: 12 : if (ignore_type)
67 : 4 : printaddr(tcp->u_arg[2]);
68 : : else
69 : 8 : printstr(tcp, tcp->u_arg[2]);
70 : 12 : tprints(", ");
71 : :
72 [ + + ]: 12 : if (old_magic) {
73 : 4 : tprints("MS_MGC_VAL");
74 [ + + ]: 4 : if (flags)
75 : 2 : tprints("|");
76 : : }
77 [ + + ]: 12 : if (flags || !old_magic)
78 : : printflags64(mount_flags, flags, "MS_???");
79 : 12 : tprints(", ");
80 : :
81 [ + + ]: 12 : if (ignore_data)
82 : 2 : printaddr(tcp->u_arg[4]);
83 : : else
84 : 10 : printstr(tcp, tcp->u_arg[4]);
85 : :
86 : 12 : return RVAL_DECODED;
87 : : }
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