1 /*
2 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
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 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "defs.h"
29
30 #include DEF_MPERS_TYPE(struct_flock)
31 #include DEF_MPERS_TYPE(struct_flock64)
32
33 #include "flock.h"
34 typedef struct_kernel_flock struct_flock;
35 typedef struct_kernel_flock64 struct_flock64;
36
37 #include MPERS_DEFS
38
39 #define SIZEOF_MEMBER(type, member) \
40 sizeof(((type *) NULL)->member)
41
42 #define FLOCK_MEMBERS_EQ(type, member) \
43 (SIZEOF_MEMBER(struct_kernel_flock64, member) == SIZEOF_MEMBER(type, member) \
44 && offsetof(struct_kernel_flock64, member) == offsetof(type, member))
45
46 #define FLOCK_STRUCTS_EQ(type) \
47 (sizeof(struct_kernel_flock64) == sizeof(type) \
48 && FLOCK_MEMBERS_EQ(type, l_type) \
49 && FLOCK_MEMBERS_EQ(type, l_whence) \
50 && FLOCK_MEMBERS_EQ(type, l_start) \
51 && FLOCK_MEMBERS_EQ(type, l_len) \
52 && FLOCK_MEMBERS_EQ(type, l_pid))
53
MPERS_PRINTER_DECL(bool,fetch_struct_flock,struct tcb * const tcp,const kernel_ulong_t addr,void * const p)54 MPERS_PRINTER_DECL(bool, fetch_struct_flock, struct tcb *const tcp,
55 const kernel_ulong_t addr, void *const p)
56 {
57 struct_kernel_flock64 *pfl = p;
58 struct_flock mfl;
59
60 if (FLOCK_STRUCTS_EQ(struct_flock))
61 return !umove_or_printaddr(tcp, addr, pfl);
62
63 if (umove_or_printaddr(tcp, addr, &mfl))
64 return false;
65
66 pfl->l_type = mfl.l_type;
67 pfl->l_whence = mfl.l_whence;
68 pfl->l_start = mfl.l_start;
69 pfl->l_len = mfl.l_len;
70 pfl->l_pid = mfl.l_pid;
71 return true;
72 }
73
MPERS_PRINTER_DECL(bool,fetch_struct_flock64,struct tcb * const tcp,const kernel_ulong_t addr,void * const p)74 MPERS_PRINTER_DECL(bool, fetch_struct_flock64, struct tcb *const tcp,
75 const kernel_ulong_t addr, void *const p)
76 {
77 struct_kernel_flock64 *pfl = p;
78 struct_flock64 mfl;
79
80 if (FLOCK_STRUCTS_EQ(struct_flock64))
81 return !umove_or_printaddr(tcp, addr, pfl);
82
83 if (umove_or_printaddr(tcp, addr, &mfl))
84 return false;
85
86 pfl->l_type = mfl.l_type;
87 pfl->l_whence = mfl.l_whence;
88 pfl->l_start = mfl.l_start;
89 pfl->l_len = mfl.l_len;
90 pfl->l_pid = mfl.l_pid;
91 return true;
92 }
93