| Dmitry V. Levin | 1a713d9 | 2015-09-19 23:48:56 +0000 | [diff] [blame] | 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 | |
| 54 | MPERS_PRINTER_DECL(bool, fetch_struct_flock)(struct tcb *tcp, const long addr, void *p) |
| 55 | { |
| 56 | struct_kernel_flock64 *pfl = p; |
| 57 | struct_flock mfl; |
| 58 | |
| 59 | if (FLOCK_STRUCTS_EQ(struct_flock)) |
| 60 | return !umove_or_printaddr(tcp, addr, pfl); |
| 61 | |
| 62 | if (umove_or_printaddr(tcp, addr, &mfl)) |
| 63 | return false; |
| 64 | |
| 65 | pfl->l_type = mfl.l_type; |
| 66 | pfl->l_whence = mfl.l_whence; |
| 67 | pfl->l_start = mfl.l_start; |
| 68 | pfl->l_len = mfl.l_len; |
| 69 | pfl->l_pid = mfl.l_pid; |
| 70 | return true; |
| 71 | } |
| 72 | |
| 73 | MPERS_PRINTER_DECL(bool, fetch_struct_flock64)(struct tcb *tcp, const long addr, void *p) |
| 74 | { |
| 75 | struct_kernel_flock64 *pfl = p; |
| 76 | struct_flock64 mfl; |
| 77 | |
| 78 | if (FLOCK_STRUCTS_EQ(struct_flock64)) |
| 79 | return !umove_or_printaddr(tcp, addr, pfl); |
| 80 | |
| 81 | if (umove_or_printaddr(tcp, addr, &mfl)) |
| 82 | return false; |
| 83 | |
| 84 | pfl->l_type = mfl.l_type; |
| 85 | pfl->l_whence = mfl.l_whence; |
| 86 | pfl->l_start = mfl.l_start; |
| 87 | pfl->l_len = mfl.l_len; |
| 88 | pfl->l_pid = mfl.l_pid; |
| 89 | return true; |
| 90 | } |