| /* |
| * volume_id - reads filesystem label and uuid |
| * |
| * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include "volume_id_internal.h" |
| |
| struct swap_header_v1_2 { |
| uint8_t bootbits[1024]; |
| uint32_t version; |
| uint32_t last_page; |
| uint32_t nr_badpages; |
| uint8_t uuid[16]; |
| uint8_t volume_name[16]; |
| } PACKED; |
| |
| #define LARGEST_PAGESIZE 0x4000 |
| |
| int FAST_FUNC volume_id_probe_linux_swap(struct volume_id *id /*,uint64_t off*/) |
| { |
| #define off ((uint64_t)0) |
| struct swap_header_v1_2 *sw; |
| const uint8_t *buf; |
| unsigned page; |
| |
| dbg("probing at offset 0x%llx", (unsigned long long) off); |
| |
| /* the swap signature is at the end of the PAGE_SIZE */ |
| for (page = 0x1000; page <= LARGEST_PAGESIZE; page <<= 1) { |
| buf = volume_id_get_buffer(id, off + page-10, 10); |
| if (buf == NULL) |
| return -1; |
| |
| if (memcmp(buf, "SWAP-SPACE", 10) == 0) { |
| // id->type_version[0] = '1'; |
| // id->type_version[1] = '\0'; |
| goto found; |
| } |
| |
| if (memcmp(buf, "SWAPSPACE2", 10) == 0 |
| || memcmp(buf, "S1SUSPEND", 9) == 0 |
| || memcmp(buf, "S2SUSPEND", 9) == 0 |
| || memcmp(buf, "ULSUSPEND", 9) == 0 |
| ) { |
| sw = volume_id_get_buffer(id, off, sizeof(struct swap_header_v1_2)); |
| if (sw == NULL) |
| return -1; |
| // id->type_version[0] = '2'; |
| // id->type_version[1] = '\0'; |
| // volume_id_set_label_raw(id, sw->volume_name, 16); |
| volume_id_set_label_string(id, sw->volume_name, 16); |
| volume_id_set_uuid(id, sw->uuid, UUID_DCE); |
| goto found; |
| } |
| } |
| return -1; |
| |
| found: |
| // volume_id_set_usage(id, VOLUME_ID_OTHER); |
| IF_FEATURE_BLKID_TYPE(id->type = "swap";) |
| |
| return 0; |
| } |