/* * 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; }