#define SWAP_CAPACITY (150 * 1024 * 1024)
+
+/* This is the first page that linux writes to the swap area */
+/* Taken from Linux */
+union swap_header {
+ struct {
+ char reserved[PAGE_SIZE - 10];
+ char magic[10]; /* SWAP-SPACE or SWAPSPACE2 */
+ } magic;
+ struct {
+ char bootbits[1024]; /* Space for disklabel etc. */
+ uint32_t version;
+ uint32_t last_page;
+ uint32_t nr_badpages;
+ unsigned char sws_uuid[16];
+ unsigned char sws_volume[16];
+ uint32_t type; // The index into the swap_map
+ uint32_t padding[116];
+ // uint32_t padding[117];
+ uint32_t badpages[1];
+ } info;
+};
+
struct swap_state {
struct vm_device * blk_dev;
PrintError("Swapping out length that is not a page multiple\n");
}
+ if (offset == 0) {
+ // This is the swap header page
+ union swap_header * hdr;
+ if (length != 4096) {
+ PrintError("Initializing Swap space by not writing page multiples. This sucks...\n");
+ return -1;
+ }
+
+ hdr = (union swap_header *)buf;
+
+
+ PrintDebug("Swap Type=%d (magic=%s)\n", hdr->info.type, hdr->magic.magic);
+ }
+
memcpy(swap->swap_space + offset, buf, length);
swap->swapped_pages += (length / 4096);