Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 1 | /* |
| 2 | * volume_id - reads filesystem label and uuid |
| 3 | * |
| 4 | * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org> |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
Sven-Göran Bergh | 3b45801 | 2013-07-31 15:45:20 +0200 | [diff] [blame^] | 21 | //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_MINIX) += minix.o |
| 22 | |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 23 | #include "volume_id_internal.h" |
| 24 | |
Denis Vlasenko | c5b7372 | 2008-03-17 09:21:26 +0000 | [diff] [blame] | 25 | struct minix_super_block { |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 26 | uint16_t s_ninodes; |
| 27 | uint16_t s_nzones; |
| 28 | uint16_t s_imap_blocks; |
| 29 | uint16_t s_zmap_blocks; |
| 30 | uint16_t s_firstdatazone; |
| 31 | uint16_t s_log_zone_size; |
| 32 | uint32_t s_max_size; |
| 33 | uint16_t s_magic; |
| 34 | uint16_t s_state; |
| 35 | uint32_t s_zones; |
Denys Vlasenko | 8dc0e19 | 2009-09-16 00:58:11 +0200 | [diff] [blame] | 36 | } PACKED; |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 37 | |
| 38 | #define MINIX_SUPERBLOCK_OFFSET 0x400 |
| 39 | |
Denys Vlasenko | 8930096 | 2009-11-01 23:07:18 +0100 | [diff] [blame] | 40 | int FAST_FUNC volume_id_probe_minix(struct volume_id *id, uint64_t off) |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 41 | { |
| 42 | struct minix_super_block *ms; |
| 43 | |
| 44 | dbg("probing at offset 0x%llx", (unsigned long long) off); |
| 45 | |
| 46 | ms = volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200); |
| 47 | if (ms == NULL) |
| 48 | return -1; |
| 49 | |
Denis Vlasenko | c5b7372 | 2008-03-17 09:21:26 +0000 | [diff] [blame] | 50 | if (ms->s_magic == cpu_to_le16(0x137f)) { |
| 51 | // id->type_version[0] = '1'; |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 52 | goto found; |
| 53 | } |
| 54 | |
Denis Vlasenko | c5b7372 | 2008-03-17 09:21:26 +0000 | [diff] [blame] | 55 | if (ms->s_magic == cpu_to_le16(0x1387)) { |
| 56 | // id->type_version[0] = '1'; |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 57 | goto found; |
| 58 | } |
| 59 | |
Denis Vlasenko | c5b7372 | 2008-03-17 09:21:26 +0000 | [diff] [blame] | 60 | if (ms->s_magic == cpu_to_le16(0x2468)) { |
| 61 | // id->type_version[0] = '2'; |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 62 | goto found; |
| 63 | } |
| 64 | |
Denis Vlasenko | c5b7372 | 2008-03-17 09:21:26 +0000 | [diff] [blame] | 65 | if (ms->s_magic == cpu_to_le16(0x2478)) { |
| 66 | // id->type_version[0] = '2'; |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 67 | goto found; |
| 68 | } |
| 69 | |
| 70 | return -1; |
| 71 | |
| 72 | found: |
Denis Vlasenko | c5b7372 | 2008-03-17 09:21:26 +0000 | [diff] [blame] | 73 | // id->type_version[1] = '\0'; |
| 74 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); |
| 75 | // id->type = "minix"; |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 76 | return 0; |
| 77 | } |