Branch data Line data Source code
1 : : /*
2 : : * Copyright (c) 2015-2017 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_sock_fprog)
31 : :
32 : : #include <linux/filter.h>
33 : : typedef struct sock_fprog struct_sock_fprog;
34 : :
35 : : #include MPERS_DEFS
36 : : #include "bpf_fprog.h"
37 : :
38 : 4 : MPERS_PRINTER_DECL(unsigned int, get_sock_fprog_size, void)
39 : : {
40 : 4 : return sizeof(struct_sock_fprog);
41 : : }
42 : :
43 : 4 : MPERS_PRINTER_DECL(bool, fetch_bpf_fprog, struct tcb *const tcp,
44 : : const kernel_ulong_t addr, void *const p)
45 : : {
46 : 4 : struct bpf_fprog *pfp = p;
47 : : struct_sock_fprog mfp;
48 : :
49 : : if ((sizeof(*pfp) == sizeof(mfp))
50 : : && (offsetof(struct bpf_fprog, filter) ==
51 : : offsetof(struct_sock_fprog, filter)))
52 : 2 : return !umove_or_printaddr(tcp, addr, pfp);
53 : :
54 [ + - ]: 2 : if (umove_or_printaddr(tcp, addr, &mfp))
55 : : return false;
56 : :
57 : 2 : pfp->len = mfp.len;
58 : 2 : pfp->filter =
59 : : #ifndef IN_MPERS
60 : : (uintptr_t)
61 : : #endif
62 : 2 : mfp.filter;
63 : 2 : return true;
64 : : }
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