chiark / gitweb /
libvolume_id: recognize swap partitions with a tuxonice hibernate image
[elogind.git] / extras / volume_id / lib / linux_swap.c
index 3937f8e..592a385 100644 (file)
 #include "libvolume_id.h"
 #include "util.h"
 
-static struct swap_header_v1_2 {
+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 *sw;
+} PACKED;
 
 #define LARGEST_PAGESIZE                       0x4000
 
-int volume_id_probe_linux_swap(struct volume_id *id, uint64_t off)
+int volume_id_probe_linux_swap(struct volume_id *id, uint64_t off, uint64_t size)
 {
        const uint8_t *buf;
        unsigned int page;
+       struct swap_header_v1_2 *sw;
 
-       info("probing at offset 0x%llx", (unsigned long long) off);
+       info("probing at offset 0x%llx\n", (unsigned long long) off);
 
-       /* the swap signature is at the end of the PAGE_SIZE */
+       /* eek, 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)
@@ -56,21 +57,40 @@ int volume_id_probe_linux_swap(struct volume_id *id, uint64_t off)
                        }
 
                        if (memcmp(buf, "SWAPSPACE2", 10) == 0) {
-                               sw = (struct swap_header_v1_2 *) volume_id_get_buffer(id, off, sizeof(struct swap_header_v1_2));
-                               if (sw == NULL)
-                                       return -1;
+                               id->type = "swap";
                                strcpy(id->type_version, "2");
-                               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;
+                               goto found_label;
+                       }
+
+                       if (memcmp(buf, "S1SUSPEND", 9) == 0) {
+                               id->type = "suspend";
+                               strcpy(id->type_version, "s1suspend");
+                               goto found_label;
+                       }
+
+                       if (memcmp(buf, "ULSUSPEND", 9) == 0) {
+                               id->type = "suspend";
+                               strcpy(id->type_version, "ulsuspend");
+                               goto found_label;
+                       }
+
+                       if (memcmp(buf, "\xed\xc3\x02\xe9\x98\x56\xe5\x0c", 8) == 0) {
+                               id->type = "suspend";
+                               strcpy(id->type_version, "tuxonice");
+                               goto found_label;
                        }
        }
        return -1;
 
+found_label:
+       sw = (struct swap_header_v1_2 *) volume_id_get_buffer(id, off, sizeof(struct swap_header_v1_2));
+       if (sw != NULL) {
+               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, 0, UUID_DCE);
+       }
+
 found:
        volume_id_set_usage(id, VOLUME_ID_OTHER);
-       id->type = "swap";
-
        return 0;
 }