From 670027c507e99521d416994a18a498def9ef2ea3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Sat, 22 Oct 2016 19:31:08 -0300 Subject: Linux-libre 4.8.3-gnu --- kernel/power/tuxonice_bio_signature.c | 403 ---------------------------------- 1 file changed, 403 deletions(-) delete mode 100644 kernel/power/tuxonice_bio_signature.c (limited to 'kernel/power/tuxonice_bio_signature.c') diff --git a/kernel/power/tuxonice_bio_signature.c b/kernel/power/tuxonice_bio_signature.c deleted file mode 100644 index f5418f092..000000000 --- a/kernel/power/tuxonice_bio_signature.c +++ /dev/null @@ -1,403 +0,0 @@ -/* - * kernel/power/tuxonice_bio_signature.c - * - * Copyright (C) 2004-2015 Nigel Cunningham (nigel at nigelcunningham com au) - * - * Distributed under GPLv2. - * - */ - -#include - -#include "tuxonice.h" -#include "tuxonice_sysfs.h" -#include "tuxonice_modules.h" -#include "tuxonice_prepare_image.h" -#include "tuxonice_bio.h" -#include "tuxonice_ui.h" -#include "tuxonice_alloc.h" -#include "tuxonice_io.h" -#include "tuxonice_builtin.h" -#include "tuxonice_bio_internal.h" - -struct sig_data *toi_sig_data; - -/* Struct of swap header pages */ - -struct old_sig_data { - dev_t device; - unsigned long sector; - int resume_attempted; - int orig_sig_type; -}; - -union diskpage { - union swap_header swh; /* swh.magic is the only member used */ - struct sig_data sig_data; - struct old_sig_data old_sig_data; -}; - -union p_diskpage { - union diskpage *pointer; - char *ptr; - unsigned long address; -}; - -char *toi_cur_sig_page; -char *toi_orig_sig_page; -int have_image; -int have_old_image; - -int get_signature_page(void) -{ - if (!toi_cur_sig_page) { - toi_message(TOI_IO, TOI_VERBOSE, 0, - "Allocating current signature page."); - toi_cur_sig_page = (char *) toi_get_zeroed_page(38, - TOI_ATOMIC_GFP); - if (!toi_cur_sig_page) { - printk(KERN_ERR "Failed to allocate memory for the " - "current image signature.\n"); - return -ENOMEM; - } - - toi_sig_data = (struct sig_data *) toi_cur_sig_page; - } - - toi_message(TOI_IO, TOI_VERBOSE, 0, "Reading signature from dev %lx," - " sector %d.", - resume_block_device->bd_dev, resume_firstblock); - - return toi_bio_ops.bdev_page_io(READ, resume_block_device, - resume_firstblock, virt_to_page(toi_cur_sig_page)); -} - -void forget_signature_page(void) -{ - if (toi_cur_sig_page) { - toi_sig_data = NULL; - toi_message(TOI_IO, TOI_VERBOSE, 0, "Freeing toi_cur_sig_page" - " (%p).", toi_cur_sig_page); - toi_free_page(38, (unsigned long) toi_cur_sig_page); - toi_cur_sig_page = NULL; - } - - if (toi_orig_sig_page) { - toi_message(TOI_IO, TOI_VERBOSE, 0, "Freeing toi_orig_sig_page" - " (%p).", toi_orig_sig_page); - toi_free_page(38, (unsigned long) toi_orig_sig_page); - toi_orig_sig_page = NULL; - } -} - -/* - * 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_mark_have_image(void) -{ - int result = 0; - char buf[32]; - struct fs_info *fs_info; - - toi_message(TOI_IO, TOI_VERBOSE, 0, "Recording that an image exists."); - memcpy(toi_sig_data->sig, tuxonice_signature, - sizeof(tuxonice_signature)); - toi_sig_data->have_image = 1; - toi_sig_data->resumed_before = 0; - toi_sig_data->header_dev_t = get_header_dev_t(); - toi_sig_data->have_uuid = 0; - - fs_info = fs_info_from_block_dev(get_header_bdev()); - if (fs_info && !IS_ERR(fs_info)) { - memcpy(toi_sig_data->header_uuid, &fs_info->uuid, 16); - free_fs_info(fs_info); - } else - result = (int) PTR_ERR(fs_info); - - if (!result) { - toi_message(TOI_IO, TOI_VERBOSE, 0, "Got uuid for dev_t %s.", - format_dev_t(buf, get_header_dev_t())); - toi_sig_data->have_uuid = 1; - } else - toi_message(TOI_IO, TOI_VERBOSE, 0, "Could not get uuid for " - "dev_t %s.", - format_dev_t(buf, get_header_dev_t())); - - toi_sig_data->first_header_block = get_headerblock(); - have_image = 1; - toi_message(TOI_IO, TOI_VERBOSE, 0, "header dev_t is %x. First block " - "is %d.", toi_sig_data->header_dev_t, - toi_sig_data->first_header_block); - - memcpy(toi_sig_data->sig2, tuxonice_signature, - sizeof(tuxonice_signature)); - toi_sig_data->header_version = TOI_HEADER_VERSION; - - return toi_bio_ops.bdev_page_io(WRITE, resume_block_device, - resume_firstblock, virt_to_page(toi_cur_sig_page)); -} - -int remove_old_signature(void) -{ - union p_diskpage swap_header_page = (union p_diskpage) toi_cur_sig_page; - char *orig_sig; - char *header_start = (char *) toi_get_zeroed_page(38, TOI_ATOMIC_GFP); - int result; - struct block_device *header_bdev; - struct old_sig_data *old_sig_data = - &swap_header_page.pointer->old_sig_data; - - header_bdev = toi_open_bdev(NULL, old_sig_data->device, 1); - result = toi_bio_ops.bdev_page_io(READ, header_bdev, - old_sig_data->sector, virt_to_page(header_start)); - - if (result) - goto out; - - /* - * TODO: Get the original contents of the first bytes of the swap - * header page. - */ - if (!old_sig_data->orig_sig_type) - orig_sig = "SWAP-SPACE"; - else - orig_sig = "SWAPSPACE2"; - - memcpy(swap_header_page.pointer->swh.magic.magic, orig_sig, 10); - memcpy(swap_header_page.ptr, header_start, 10); - - result = toi_bio_ops.bdev_page_io(WRITE, resume_block_device, - resume_firstblock, virt_to_page(swap_header_page.ptr)); - -out: - toi_close_bdev(header_bdev); - have_old_image = 0; - toi_free_page(38, (unsigned long) header_start); - return result; -} - -/* - * toi_bio_restore_original_signature - restore the original signature - * - * At boot time (aborting pre atomic-restore), toi_orig_sig_page gets used. - * It will have the original signature page contents, stored in the image - * header. Post atomic-restore, we use :toi_cur_sig_page, which will contain - * the contents that were loaded when we started the cycle. - */ -int toi_bio_restore_original_signature(void) -{ - char *use = toi_orig_sig_page ? toi_orig_sig_page : toi_cur_sig_page; - - if (have_old_image) - return remove_old_signature(); - - if (!use) { - printk("toi_bio_restore_original_signature: No signature " - "page loaded.\n"); - return 0; - } - - toi_message(TOI_IO, TOI_VERBOSE, 0, "Recording that no image exists."); - have_image = 0; - toi_sig_data->have_image = 0; - return toi_bio_ops.bdev_page_io(WRITE, resume_block_device, - resume_firstblock, virt_to_page(use)); -} - -/* - * check_for_signature - See whether we have an image. - * - * Returns 0 if no image, 1 if there is one, -1 if indeterminate. - */ -int toi_check_for_signature(void) -{ - union p_diskpage swap_header_page; - int type; - const char *normal_sigs[] = {"SWAP-SPACE", "SWAPSPACE2" }; - const char *swsusp_sigs[] = {"S1SUSP", "S2SUSP", "S1SUSPEND" }; - char *swap_header; - - if (!toi_cur_sig_page) { - int result = get_signature_page(); - - if (result) - return result; - } - - /* - * Start by looking for the binary header. - */ - if (!memcmp(tuxonice_signature, toi_cur_sig_page, - sizeof(tuxonice_signature))) { - have_image = toi_sig_data->have_image; - toi_message(TOI_IO, TOI_VERBOSE, 0, "Have binary signature. " - "Have image is %d.", have_image); - if (have_image) - toi_message(TOI_IO, TOI_VERBOSE, 0, "header dev_t is " - "%x. First block is %d.", - toi_sig_data->header_dev_t, - toi_sig_data->first_header_block); - return toi_sig_data->have_image; - } - - /* - * Failing that, try old file allocator headers. - */ - - if (!memcmp(HaveImage, toi_cur_sig_page, strlen(HaveImage))) { - have_image = 1; - return 1; - } - - have_image = 0; - - if (!memcmp(NoImage, toi_cur_sig_page, strlen(NoImage))) - return 0; - - /* - * Nope? How about swap? - */ - swap_header_page = (union p_diskpage) toi_cur_sig_page; - swap_header = swap_header_page.pointer->swh.magic.magic; - - /* Normal swapspace? */ - for (type = 0; type < 2; type++) - if (!memcmp(normal_sigs[type], swap_header, - strlen(normal_sigs[type]))) - return 0; - - /* Swsusp or uswsusp? */ - for (type = 0; type < 3; type++) - if (!memcmp(swsusp_sigs[type], swap_header, - strlen(swsusp_sigs[type]))) - return 2; - - /* Old TuxOnIce version? */ - if (!memcmp(tuxonice_signature, swap_header, - sizeof(tuxonice_signature) - 1)) { - toi_message(TOI_IO, TOI_VERBOSE, 0, "Found old TuxOnIce " - "signature."); - have_old_image = 1; - return 3; - } - - return -1; -} - -/* - * Image_exists - * - * Returns -1 if don't know, otherwise 0 (no) or 1 (yes). - */ -int toi_bio_image_exists(int quiet) -{ - int result; - char *msg = NULL; - - toi_message(TOI_IO, TOI_VERBOSE, 0, "toi_bio_image_exists."); - - if (!resume_dev_t) { - if (!quiet) - printk(KERN_INFO "Not even trying to read header " - "because resume_dev_t is not set.\n"); - return -1; - } - - if (open_resume_dev_t(0, quiet)) - return -1; - - result = toi_check_for_signature(); - - clear_toi_state(TOI_RESUMED_BEFORE); - if (toi_sig_data->resumed_before) - set_toi_state(TOI_RESUMED_BEFORE); - - if (quiet || result == -ENOMEM) - return result; - - if (result == -1) - msg = "TuxOnIce: Unable to find a signature." - " Could you have moved a swap file?\n"; - else if (!result) - msg = "TuxOnIce: No image found.\n"; - else if (result == 1) - msg = "TuxOnIce: Image found.\n"; - else if (result == 2) - msg = "TuxOnIce: uswsusp or swsusp image found.\n"; - else if (result == 3) - msg = "TuxOnIce: Old implementation's signature found.\n"; - - printk(KERN_INFO "%s", msg); - - return result; -} - -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; -} - -int toi_bio_get_header_version(void) -{ - return (memcmp(toi_sig_data->sig2, tuxonice_signature, - sizeof(tuxonice_signature))) ? - 0 : toi_sig_data->header_version; - -} -- cgit v1.2.3