/*
* We need to ensure we use the signature page that's currently on disk,
* so as to not remove the image header. Post-atomic-restore, the orig sig
* page will be empty, so we can use that as our method of knowing that we
* need to load the on-disk signature and not use the non-image sig in
* memory. (We're going to powerdown after writing the change, so it's safe.
*/
int toi_bio_mark_resume_attempted(int flag)
{
toi_message(TOI_IO, TOI_VERBOSE, 0, "Make resume attempted = %d.", flag);
if (!toi_orig_sig_page) {
forget_signature_page();
get_signature_page();
}
toi_sig_data->resumed_before = flag;
return toi_bio_ops.bdev_page_io(WRITE, resume_block_device,
resume_firstblock, virt_to_page(toi_cur_sig_page));
}
int toi_bio_scan_for_image(int quiet)
{
struct block_device *bdev;
char default_name[255] = "";
if (!quiet)
printk(KERN_DEBUG "Scanning swap devices for TuxOnIce "
"signature...\n");
for (bdev = next_bdev_of_type(NULL, "swap"); bdev;
bdev = next_bdev_of_type(bdev, "swap")) {
int result;
char name[255] = "";
sprintf(name, "%u:%u", MAJOR(bdev->bd_dev),
MINOR(bdev->bd_dev));
if (!quiet)
printk(KERN_DEBUG "- Trying %s.\n", name);
resume_block_device = bdev;
resume_dev_t = bdev->bd_dev;
result = toi_check_for_signature();
resume_block_device = NULL;
resume_dev_t = MKDEV(0, 0);
if (!default_name[0])
strcpy(default_name, name);
if (result == 1) {
/* Got one! */
strcpy(resume_file, name);
next_bdev_of_type(bdev, NULL);
if (!quiet)
printk(KERN_DEBUG " ==> Image found on %s.\n",
resume_file);
return 1;
}
forget_signature_page();
}
if (!quiet)
printk(KERN_DEBUG "TuxOnIce scan: No image found.\n");
strcpy(resume_file, default_name);
return 0;
}
