Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1 | /* |
| 2 | * linux/kernel/power/swap.c |
| 3 | * |
| 4 | * This file provides functions for reading the suspend image from |
| 5 | * and writing it to a swap partition. |
| 6 | * |
Pavel Machek | a253129 | 2010-07-18 14:27:13 +0200 | [diff] [blame] | 7 | * Copyright (C) 1998,2001-2005 Pavel Machek <pavel@ucw.cz> |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 8 | * Copyright (C) 2006 Rafael J. Wysocki <rjw@sisk.pl> |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 9 | * Copyright (C) 2010-2012 Bojan Smojver <bojan@rexursive.com> |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 10 | * |
| 11 | * This file is released under the GPLv2. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 16 | #include <linux/file.h> |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 17 | #include <linux/delay.h> |
| 18 | #include <linux/bitops.h> |
| 19 | #include <linux/genhd.h> |
| 20 | #include <linux/device.h> |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 21 | #include <linux/bio.h> |
Andrew Morton | 546e0d2 | 2006-09-25 23:32:44 -0700 | [diff] [blame] | 22 | #include <linux/blkdev.h> |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 23 | #include <linux/swap.h> |
| 24 | #include <linux/swapops.h> |
| 25 | #include <linux/pm.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 27 | #include <linux/lzo.h> |
| 28 | #include <linux/vmalloc.h> |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 29 | #include <linux/cpumask.h> |
| 30 | #include <linux/atomic.h> |
| 31 | #include <linux/kthread.h> |
| 32 | #include <linux/crc32.h> |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 33 | #include <linux/ktime.h> |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 34 | |
| 35 | #include "power.h" |
| 36 | |
Rafael J. Wysocki | be8cd64 | 2010-12-11 21:46:44 +0100 | [diff] [blame] | 37 | #define HIBERNATE_SIG "S1SUSPEND" |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 38 | |
Jiri Slaby | 51fb352 | 2010-05-01 23:53:02 +0200 | [diff] [blame] | 39 | /* |
James Morse | f6cf054 | 2016-04-27 17:47:11 +0100 | [diff] [blame] | 40 | * When reading an {un,}compressed image, we may restore pages in place, |
| 41 | * in which case some architectures need these pages cleaning before they |
| 42 | * can be executed. We don't know which pages these may be, so clean the lot. |
| 43 | */ |
| 44 | static bool clean_pages_on_read; |
| 45 | static bool clean_pages_on_decompress; |
| 46 | |
| 47 | /* |
Jiri Slaby | 51fb352 | 2010-05-01 23:53:02 +0200 | [diff] [blame] | 48 | * The swap map is a data structure used for keeping track of each page |
| 49 | * written to a swap partition. It consists of many swap_map_page |
Cesar Eduardo Barros | 9013367 | 2010-06-07 22:23:12 +0200 | [diff] [blame] | 50 | * structures that contain each an array of MAP_PAGE_ENTRIES swap entries. |
Jiri Slaby | 51fb352 | 2010-05-01 23:53:02 +0200 | [diff] [blame] | 51 | * These structures are stored on the swap and linked together with the |
| 52 | * help of the .next_swap member. |
| 53 | * |
| 54 | * The swap map is created during suspend. The swap map pages are |
| 55 | * allocated and populated one at a time, so we only need one memory |
| 56 | * page to set up the entire structure. |
| 57 | * |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 58 | * During resume we pick up all swap_map_page structures into a list. |
Jiri Slaby | 51fb352 | 2010-05-01 23:53:02 +0200 | [diff] [blame] | 59 | */ |
| 60 | |
| 61 | #define MAP_PAGE_ENTRIES (PAGE_SIZE / sizeof(sector_t) - 1) |
| 62 | |
Bojan Smojver | f8262d4 | 2012-04-24 23:53:28 +0200 | [diff] [blame] | 63 | /* |
| 64 | * Number of free pages that are not high. |
| 65 | */ |
| 66 | static inline unsigned long low_free_pages(void) |
| 67 | { |
| 68 | return nr_free_pages() - nr_free_highpages(); |
| 69 | } |
| 70 | |
| 71 | /* |
| 72 | * Number of pages required to be kept free while writing the image. Always |
| 73 | * half of all available low pages before the writing starts. |
| 74 | */ |
| 75 | static inline unsigned long reqd_free_pages(void) |
| 76 | { |
| 77 | return low_free_pages() / 2; |
| 78 | } |
| 79 | |
Jiri Slaby | 51fb352 | 2010-05-01 23:53:02 +0200 | [diff] [blame] | 80 | struct swap_map_page { |
| 81 | sector_t entries[MAP_PAGE_ENTRIES]; |
| 82 | sector_t next_swap; |
| 83 | }; |
| 84 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 85 | struct swap_map_page_list { |
| 86 | struct swap_map_page *map; |
| 87 | struct swap_map_page_list *next; |
| 88 | }; |
| 89 | |
Jiri Slaby | 51fb352 | 2010-05-01 23:53:02 +0200 | [diff] [blame] | 90 | /** |
| 91 | * The swap_map_handle structure is used for handling swap in |
| 92 | * a file-alike way |
| 93 | */ |
| 94 | |
| 95 | struct swap_map_handle { |
| 96 | struct swap_map_page *cur; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 97 | struct swap_map_page_list *maps; |
Jiri Slaby | 51fb352 | 2010-05-01 23:53:02 +0200 | [diff] [blame] | 98 | sector_t cur_swap; |
| 99 | sector_t first_sector; |
| 100 | unsigned int k; |
Bojan Smojver | f8262d4 | 2012-04-24 23:53:28 +0200 | [diff] [blame] | 101 | unsigned long reqd_free_pages; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 102 | u32 crc32; |
Jiri Slaby | 51fb352 | 2010-05-01 23:53:02 +0200 | [diff] [blame] | 103 | }; |
| 104 | |
Vivek Goyal | 1b29c16 | 2007-05-02 19:27:07 +0200 | [diff] [blame] | 105 | struct swsusp_header { |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 106 | char reserved[PAGE_SIZE - 20 - sizeof(sector_t) - sizeof(int) - |
| 107 | sizeof(u32)]; |
| 108 | u32 crc32; |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 109 | sector_t image; |
Rafael J. Wysocki | a634cc1 | 2007-07-19 01:47:30 -0700 | [diff] [blame] | 110 | unsigned int flags; /* Flags to pass to the "boot" kernel */ |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 111 | char orig_sig[10]; |
| 112 | char sig[10]; |
Gideon Israel Dsouza | 52f5684c | 2014-04-07 15:39:20 -0700 | [diff] [blame] | 113 | } __packed; |
Vivek Goyal | 1b29c16 | 2007-05-02 19:27:07 +0200 | [diff] [blame] | 114 | |
| 115 | static struct swsusp_header *swsusp_header; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 116 | |
Nigel Cunningham | 0414f2e | 2009-12-06 16:15:53 +0100 | [diff] [blame] | 117 | /** |
| 118 | * The following functions are used for tracing the allocated |
| 119 | * swap pages, so that they can be freed in case of an error. |
| 120 | */ |
| 121 | |
| 122 | struct swsusp_extent { |
| 123 | struct rb_node node; |
| 124 | unsigned long start; |
| 125 | unsigned long end; |
| 126 | }; |
| 127 | |
| 128 | static struct rb_root swsusp_extents = RB_ROOT; |
| 129 | |
| 130 | static int swsusp_extents_insert(unsigned long swap_offset) |
| 131 | { |
| 132 | struct rb_node **new = &(swsusp_extents.rb_node); |
| 133 | struct rb_node *parent = NULL; |
| 134 | struct swsusp_extent *ext; |
| 135 | |
| 136 | /* Figure out where to put the new node */ |
| 137 | while (*new) { |
Davidlohr Bueso | 8316bd7 | 2012-10-23 01:21:09 +0200 | [diff] [blame] | 138 | ext = rb_entry(*new, struct swsusp_extent, node); |
Nigel Cunningham | 0414f2e | 2009-12-06 16:15:53 +0100 | [diff] [blame] | 139 | parent = *new; |
| 140 | if (swap_offset < ext->start) { |
| 141 | /* Try to merge */ |
| 142 | if (swap_offset == ext->start - 1) { |
| 143 | ext->start--; |
| 144 | return 0; |
| 145 | } |
| 146 | new = &((*new)->rb_left); |
| 147 | } else if (swap_offset > ext->end) { |
| 148 | /* Try to merge */ |
| 149 | if (swap_offset == ext->end + 1) { |
| 150 | ext->end++; |
| 151 | return 0; |
| 152 | } |
| 153 | new = &((*new)->rb_right); |
| 154 | } else { |
| 155 | /* It already is in the tree */ |
| 156 | return -EINVAL; |
| 157 | } |
| 158 | } |
| 159 | /* Add the new node and rebalance the tree. */ |
| 160 | ext = kzalloc(sizeof(struct swsusp_extent), GFP_KERNEL); |
| 161 | if (!ext) |
| 162 | return -ENOMEM; |
| 163 | |
| 164 | ext->start = swap_offset; |
| 165 | ext->end = swap_offset; |
| 166 | rb_link_node(&ext->node, parent, new); |
| 167 | rb_insert_color(&ext->node, &swsusp_extents); |
| 168 | return 0; |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * alloc_swapdev_block - allocate a swap page and register that it has |
| 173 | * been allocated, so that it can be freed in case of an error. |
| 174 | */ |
| 175 | |
| 176 | sector_t alloc_swapdev_block(int swap) |
| 177 | { |
| 178 | unsigned long offset; |
| 179 | |
Hugh Dickins | 910321e | 2010-09-09 16:38:07 -0700 | [diff] [blame] | 180 | offset = swp_offset(get_swap_page_of_type(swap)); |
Nigel Cunningham | 0414f2e | 2009-12-06 16:15:53 +0100 | [diff] [blame] | 181 | if (offset) { |
| 182 | if (swsusp_extents_insert(offset)) |
Hugh Dickins | 910321e | 2010-09-09 16:38:07 -0700 | [diff] [blame] | 183 | swap_free(swp_entry(swap, offset)); |
Nigel Cunningham | 0414f2e | 2009-12-06 16:15:53 +0100 | [diff] [blame] | 184 | else |
| 185 | return swapdev_block(swap, offset); |
| 186 | } |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * free_all_swap_pages - free swap pages allocated for saving image data. |
Cesar Eduardo Barros | 9013367 | 2010-06-07 22:23:12 +0200 | [diff] [blame] | 192 | * It also frees the extents used to register which swap entries had been |
Nigel Cunningham | 0414f2e | 2009-12-06 16:15:53 +0100 | [diff] [blame] | 193 | * allocated. |
| 194 | */ |
| 195 | |
| 196 | void free_all_swap_pages(int swap) |
| 197 | { |
| 198 | struct rb_node *node; |
| 199 | |
| 200 | while ((node = swsusp_extents.rb_node)) { |
| 201 | struct swsusp_extent *ext; |
| 202 | unsigned long offset; |
| 203 | |
| 204 | ext = container_of(node, struct swsusp_extent, node); |
| 205 | rb_erase(node, &swsusp_extents); |
| 206 | for (offset = ext->start; offset <= ext->end; offset++) |
Hugh Dickins | 910321e | 2010-09-09 16:38:07 -0700 | [diff] [blame] | 207 | swap_free(swp_entry(swap, offset)); |
Nigel Cunningham | 0414f2e | 2009-12-06 16:15:53 +0100 | [diff] [blame] | 208 | |
| 209 | kfree(ext); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | int swsusp_swap_in_use(void) |
| 214 | { |
| 215 | return (swsusp_extents.rb_node != NULL); |
| 216 | } |
| 217 | |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 218 | /* |
Rafael J. Wysocki | 3fc6b34 | 2006-12-06 20:34:09 -0800 | [diff] [blame] | 219 | * General things |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 220 | */ |
| 221 | |
| 222 | static unsigned short root_swap = 0xffff; |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 223 | static struct block_device *hib_resume_bdev; |
| 224 | |
| 225 | struct hib_bio_batch { |
| 226 | atomic_t count; |
| 227 | wait_queue_head_t wait; |
| 228 | int error; |
| 229 | }; |
| 230 | |
| 231 | static void hib_init_batch(struct hib_bio_batch *hb) |
| 232 | { |
| 233 | atomic_set(&hb->count, 0); |
| 234 | init_waitqueue_head(&hb->wait); |
| 235 | hb->error = 0; |
| 236 | } |
| 237 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 238 | static void hib_end_io(struct bio *bio) |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 239 | { |
| 240 | struct hib_bio_batch *hb = bio->bi_private; |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 241 | struct page *page = bio->bi_io_vec[0].bv_page; |
| 242 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 243 | if (bio->bi_error) { |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 244 | printk(KERN_ALERT "Read-error on swap-device (%u:%u:%Lu)\n", |
| 245 | imajor(bio->bi_bdev->bd_inode), |
| 246 | iminor(bio->bi_bdev->bd_inode), |
| 247 | (unsigned long long)bio->bi_iter.bi_sector); |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 248 | } |
| 249 | |
| 250 | if (bio_data_dir(bio) == WRITE) |
| 251 | put_page(page); |
James Morse | f6cf054 | 2016-04-27 17:47:11 +0100 | [diff] [blame] | 252 | else if (clean_pages_on_read) |
| 253 | flush_icache_range((unsigned long)page_address(page), |
| 254 | (unsigned long)page_address(page) + PAGE_SIZE); |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 255 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 256 | if (bio->bi_error && !hb->error) |
| 257 | hb->error = bio->bi_error; |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 258 | if (atomic_dec_and_test(&hb->count)) |
| 259 | wake_up(&hb->wait); |
| 260 | |
| 261 | bio_put(bio); |
| 262 | } |
| 263 | |
Mike Christie | 162b99e | 2016-06-05 14:32:02 -0500 | [diff] [blame] | 264 | static int hib_submit_io(int op, int op_flags, pgoff_t page_off, void *addr, |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 265 | struct hib_bio_batch *hb) |
| 266 | { |
| 267 | struct page *page = virt_to_page(addr); |
| 268 | struct bio *bio; |
| 269 | int error = 0; |
| 270 | |
Mel Gorman | 71baba4 | 2015-11-06 16:28:28 -0800 | [diff] [blame] | 271 | bio = bio_alloc(__GFP_RECLAIM | __GFP_HIGH, 1); |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 272 | bio->bi_iter.bi_sector = page_off * (PAGE_SIZE >> 9); |
| 273 | bio->bi_bdev = hib_resume_bdev; |
Mike Christie | 162b99e | 2016-06-05 14:32:02 -0500 | [diff] [blame] | 274 | bio_set_op_attrs(bio, op, op_flags); |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 275 | |
| 276 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
| 277 | printk(KERN_ERR "PM: Adding page to bio failed at %llu\n", |
| 278 | (unsigned long long)bio->bi_iter.bi_sector); |
| 279 | bio_put(bio); |
| 280 | return -EFAULT; |
| 281 | } |
| 282 | |
| 283 | if (hb) { |
| 284 | bio->bi_end_io = hib_end_io; |
| 285 | bio->bi_private = hb; |
| 286 | atomic_inc(&hb->count); |
Mike Christie | 4e49ea4 | 2016-06-05 14:31:41 -0500 | [diff] [blame] | 287 | submit_bio(bio); |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 288 | } else { |
Mike Christie | 4e49ea4 | 2016-06-05 14:31:41 -0500 | [diff] [blame] | 289 | error = submit_bio_wait(bio); |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 290 | bio_put(bio); |
| 291 | } |
| 292 | |
| 293 | return error; |
| 294 | } |
| 295 | |
| 296 | static int hib_wait_io(struct hib_bio_batch *hb) |
| 297 | { |
| 298 | wait_event(hb->wait, atomic_read(&hb->count) == 0); |
| 299 | return hb->error; |
| 300 | } |
Rafael J. Wysocki | 3fc6b34 | 2006-12-06 20:34:09 -0800 | [diff] [blame] | 301 | |
Rafael J. Wysocki | 3fc6b34 | 2006-12-06 20:34:09 -0800 | [diff] [blame] | 302 | /* |
| 303 | * Saving part |
| 304 | */ |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 305 | |
Jiri Slaby | 51fb352 | 2010-05-01 23:53:02 +0200 | [diff] [blame] | 306 | static int mark_swapfiles(struct swap_map_handle *handle, unsigned int flags) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 307 | { |
| 308 | int error; |
| 309 | |
Mike Christie | 162b99e | 2016-06-05 14:32:02 -0500 | [diff] [blame] | 310 | hib_submit_io(REQ_OP_READ, READ_SYNC, swsusp_resume_block, |
| 311 | swsusp_header, NULL); |
Vivek Goyal | 1b29c16 | 2007-05-02 19:27:07 +0200 | [diff] [blame] | 312 | if (!memcmp("SWAP-SPACE",swsusp_header->sig, 10) || |
| 313 | !memcmp("SWAPSPACE2",swsusp_header->sig, 10)) { |
| 314 | memcpy(swsusp_header->orig_sig,swsusp_header->sig, 10); |
Rafael J. Wysocki | 3624eb0 | 2010-10-04 22:08:12 +0200 | [diff] [blame] | 315 | memcpy(swsusp_header->sig, HIBERNATE_SIG, 10); |
Jiri Slaby | 51fb352 | 2010-05-01 23:53:02 +0200 | [diff] [blame] | 316 | swsusp_header->image = handle->first_sector; |
Rafael J. Wysocki | a634cc1 | 2007-07-19 01:47:30 -0700 | [diff] [blame] | 317 | swsusp_header->flags = flags; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 318 | if (flags & SF_CRC32_MODE) |
| 319 | swsusp_header->crc32 = handle->crc32; |
Mike Christie | 162b99e | 2016-06-05 14:32:02 -0500 | [diff] [blame] | 320 | error = hib_submit_io(REQ_OP_WRITE, WRITE_SYNC, |
| 321 | swsusp_resume_block, swsusp_header, NULL); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 322 | } else { |
Rafael J. Wysocki | 2397672 | 2007-12-08 02:09:43 +0100 | [diff] [blame] | 323 | printk(KERN_ERR "PM: Swap header not found!\n"); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 324 | error = -ENODEV; |
| 325 | } |
| 326 | return error; |
| 327 | } |
| 328 | |
| 329 | /** |
| 330 | * swsusp_swap_check - check if the resume device is a swap device |
| 331 | * and get its index (if so) |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 332 | * |
| 333 | * This is called before saving image |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 334 | */ |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 335 | static int swsusp_swap_check(void) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 336 | { |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 337 | int res; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 338 | |
Rafael J. Wysocki | 7bf2368 | 2007-01-05 16:36:28 -0800 | [diff] [blame] | 339 | res = swap_type_of(swsusp_resume_device, swsusp_resume_block, |
Jiri Slaby | 8a0d613 | 2010-05-01 23:52:34 +0200 | [diff] [blame] | 340 | &hib_resume_bdev); |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 341 | if (res < 0) |
| 342 | return res; |
| 343 | |
| 344 | root_swap = res; |
Tejun Heo | e525fd8 | 2010-11-13 11:55:17 +0100 | [diff] [blame] | 345 | res = blkdev_get(hib_resume_bdev, FMODE_WRITE, NULL); |
Rafael J. Wysocki | 7bf2368 | 2007-01-05 16:36:28 -0800 | [diff] [blame] | 346 | if (res) |
| 347 | return res; |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 348 | |
Jiri Slaby | 8a0d613 | 2010-05-01 23:52:34 +0200 | [diff] [blame] | 349 | res = set_blocksize(hib_resume_bdev, PAGE_SIZE); |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 350 | if (res < 0) |
Jiri Slaby | 8a0d613 | 2010-05-01 23:52:34 +0200 | [diff] [blame] | 351 | blkdev_put(hib_resume_bdev, FMODE_WRITE); |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 352 | |
Chen Yu | fe12c00 | 2016-07-22 10:30:47 +0800 | [diff] [blame] | 353 | /* |
| 354 | * Update the resume device to the one actually used, |
| 355 | * so the test_resume mode can use it in case it is |
| 356 | * invoked from hibernate() to test the snapshot. |
| 357 | */ |
| 358 | swsusp_resume_device = hib_resume_bdev->bd_dev; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 359 | return res; |
| 360 | } |
| 361 | |
| 362 | /** |
| 363 | * write_page - Write one page to given swap location. |
| 364 | * @buf: Address we're writing. |
| 365 | * @offset: Offset of the swap page we're writing to. |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 366 | * @hb: bio completion batch |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 367 | */ |
| 368 | |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 369 | static int write_page(void *buf, sector_t offset, struct hib_bio_batch *hb) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 370 | { |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 371 | void *src; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 372 | int ret; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 373 | |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 374 | if (!offset) |
| 375 | return -ENOSPC; |
Andrew Morton | ab95416 | 2006-09-25 23:32:42 -0700 | [diff] [blame] | 376 | |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 377 | if (hb) { |
Mel Gorman | 71baba4 | 2015-11-06 16:28:28 -0800 | [diff] [blame] | 378 | src = (void *)__get_free_page(__GFP_RECLAIM | __GFP_NOWARN | |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 379 | __GFP_NORETRY); |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 380 | if (src) { |
Jan Beulich | 3ecb01d | 2010-10-26 14:22:27 -0700 | [diff] [blame] | 381 | copy_page(src, buf); |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 382 | } else { |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 383 | ret = hib_wait_io(hb); /* Free pages */ |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 384 | if (ret) |
| 385 | return ret; |
Mel Gorman | 71baba4 | 2015-11-06 16:28:28 -0800 | [diff] [blame] | 386 | src = (void *)__get_free_page(__GFP_RECLAIM | |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 387 | __GFP_NOWARN | |
| 388 | __GFP_NORETRY); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 389 | if (src) { |
| 390 | copy_page(src, buf); |
| 391 | } else { |
| 392 | WARN_ON_ONCE(1); |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 393 | hb = NULL; /* Go synchronous */ |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 394 | src = buf; |
| 395 | } |
Andrew Morton | ab95416 | 2006-09-25 23:32:42 -0700 | [diff] [blame] | 396 | } |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 397 | } else { |
| 398 | src = buf; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 399 | } |
Mike Christie | 162b99e | 2016-06-05 14:32:02 -0500 | [diff] [blame] | 400 | return hib_submit_io(REQ_OP_WRITE, WRITE_SYNC, offset, src, hb); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 401 | } |
| 402 | |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 403 | static void release_swap_writer(struct swap_map_handle *handle) |
| 404 | { |
| 405 | if (handle->cur) |
| 406 | free_page((unsigned long)handle->cur); |
| 407 | handle->cur = NULL; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | static int get_swap_writer(struct swap_map_handle *handle) |
| 411 | { |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 412 | int ret; |
| 413 | |
| 414 | ret = swsusp_swap_check(); |
| 415 | if (ret) { |
| 416 | if (ret != -ENOSPC) |
| 417 | printk(KERN_ERR "PM: Cannot find swap device, try " |
| 418 | "swapon -a.\n"); |
| 419 | return ret; |
| 420 | } |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 421 | handle->cur = (struct swap_map_page *)get_zeroed_page(GFP_KERNEL); |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 422 | if (!handle->cur) { |
| 423 | ret = -ENOMEM; |
| 424 | goto err_close; |
| 425 | } |
Rafael J. Wysocki | d1d241c | 2007-05-06 14:50:47 -0700 | [diff] [blame] | 426 | handle->cur_swap = alloc_swapdev_block(root_swap); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 427 | if (!handle->cur_swap) { |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 428 | ret = -ENOSPC; |
| 429 | goto err_rel; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 430 | } |
| 431 | handle->k = 0; |
Bojan Smojver | f8262d4 | 2012-04-24 23:53:28 +0200 | [diff] [blame] | 432 | handle->reqd_free_pages = reqd_free_pages(); |
Jiri Slaby | 51fb352 | 2010-05-01 23:53:02 +0200 | [diff] [blame] | 433 | handle->first_sector = handle->cur_swap; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 434 | return 0; |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 435 | err_rel: |
| 436 | release_swap_writer(handle); |
| 437 | err_close: |
| 438 | swsusp_close(FMODE_WRITE); |
| 439 | return ret; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 440 | } |
| 441 | |
Andrew Morton | ab95416 | 2006-09-25 23:32:42 -0700 | [diff] [blame] | 442 | static int swap_write_page(struct swap_map_handle *handle, void *buf, |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 443 | struct hib_bio_batch *hb) |
Andrew Morton | ab95416 | 2006-09-25 23:32:42 -0700 | [diff] [blame] | 444 | { |
| 445 | int error = 0; |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 446 | sector_t offset; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 447 | |
| 448 | if (!handle->cur) |
| 449 | return -EINVAL; |
Rafael J. Wysocki | d1d241c | 2007-05-06 14:50:47 -0700 | [diff] [blame] | 450 | offset = alloc_swapdev_block(root_swap); |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 451 | error = write_page(buf, offset, hb); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 452 | if (error) |
| 453 | return error; |
| 454 | handle->cur->entries[handle->k++] = offset; |
| 455 | if (handle->k >= MAP_PAGE_ENTRIES) { |
Rafael J. Wysocki | d1d241c | 2007-05-06 14:50:47 -0700 | [diff] [blame] | 456 | offset = alloc_swapdev_block(root_swap); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 457 | if (!offset) |
| 458 | return -ENOSPC; |
| 459 | handle->cur->next_swap = offset; |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 460 | error = write_page(handle->cur, handle->cur_swap, hb); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 461 | if (error) |
Andrew Morton | ab95416 | 2006-09-25 23:32:42 -0700 | [diff] [blame] | 462 | goto out; |
Jan Beulich | 3ecb01d | 2010-10-26 14:22:27 -0700 | [diff] [blame] | 463 | clear_page(handle->cur); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 464 | handle->cur_swap = offset; |
| 465 | handle->k = 0; |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 466 | |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 467 | if (hb && low_free_pages() <= handle->reqd_free_pages) { |
| 468 | error = hib_wait_io(hb); |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 469 | if (error) |
| 470 | goto out; |
| 471 | /* |
| 472 | * Recalculate the number of required free pages, to |
| 473 | * make sure we never take more than half. |
| 474 | */ |
| 475 | handle->reqd_free_pages = reqd_free_pages(); |
| 476 | } |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 477 | } |
Rafael J. Wysocki | 59a49335 | 2006-12-06 20:34:44 -0800 | [diff] [blame] | 478 | out: |
Andrew Morton | ab95416 | 2006-09-25 23:32:42 -0700 | [diff] [blame] | 479 | return error; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 480 | } |
| 481 | |
| 482 | static int flush_swap_writer(struct swap_map_handle *handle) |
| 483 | { |
| 484 | if (handle->cur && handle->cur_swap) |
Andrew Morton | ab95416 | 2006-09-25 23:32:42 -0700 | [diff] [blame] | 485 | return write_page(handle->cur, handle->cur_swap, NULL); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 486 | else |
| 487 | return -EINVAL; |
| 488 | } |
| 489 | |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 490 | static int swap_writer_finish(struct swap_map_handle *handle, |
| 491 | unsigned int flags, int error) |
| 492 | { |
| 493 | if (!error) { |
| 494 | flush_swap_writer(handle); |
| 495 | printk(KERN_INFO "PM: S"); |
| 496 | error = mark_swapfiles(handle, flags); |
| 497 | printk("|\n"); |
| 498 | } |
| 499 | |
| 500 | if (error) |
| 501 | free_all_swap_pages(root_swap); |
| 502 | release_swap_writer(handle); |
| 503 | swsusp_close(FMODE_WRITE); |
| 504 | |
| 505 | return error; |
| 506 | } |
| 507 | |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 508 | /* We need to remember how much compressed data we need to read. */ |
| 509 | #define LZO_HEADER sizeof(size_t) |
| 510 | |
| 511 | /* Number of pages/bytes we'll compress at one time. */ |
| 512 | #define LZO_UNC_PAGES 32 |
| 513 | #define LZO_UNC_SIZE (LZO_UNC_PAGES * PAGE_SIZE) |
| 514 | |
| 515 | /* Number of pages/bytes we need for compressed data (worst case). */ |
| 516 | #define LZO_CMP_PAGES DIV_ROUND_UP(lzo1x_worst_compress(LZO_UNC_SIZE) + \ |
| 517 | LZO_HEADER, PAGE_SIZE) |
| 518 | #define LZO_CMP_SIZE (LZO_CMP_PAGES * PAGE_SIZE) |
| 519 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 520 | /* Maximum number of threads for compression/decompression. */ |
| 521 | #define LZO_THREADS 3 |
| 522 | |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 523 | /* Minimum/maximum number of pages for read buffering. */ |
| 524 | #define LZO_MIN_RD_PAGES 1024 |
| 525 | #define LZO_MAX_RD_PAGES 8192 |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 526 | |
| 527 | |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 528 | /** |
| 529 | * save_image - save the suspend image data |
| 530 | */ |
| 531 | |
| 532 | static int save_image(struct swap_map_handle *handle, |
| 533 | struct snapshot_handle *snapshot, |
Andrew Morton | 3a4f757 | 2006-09-25 23:32:41 -0700 | [diff] [blame] | 534 | unsigned int nr_to_write) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 535 | { |
| 536 | unsigned int m; |
| 537 | int ret; |
Andrew Morton | 3a4f757 | 2006-09-25 23:32:41 -0700 | [diff] [blame] | 538 | int nr_pages; |
Andrew Morton | ab95416 | 2006-09-25 23:32:42 -0700 | [diff] [blame] | 539 | int err2; |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 540 | struct hib_bio_batch hb; |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 541 | ktime_t start; |
| 542 | ktime_t stop; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 543 | |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 544 | hib_init_batch(&hb); |
| 545 | |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 546 | printk(KERN_INFO "PM: Saving image data pages (%u pages)...\n", |
Rafael J. Wysocki | 2397672 | 2007-12-08 02:09:43 +0100 | [diff] [blame] | 547 | nr_to_write); |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 548 | m = nr_to_write / 10; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 549 | if (!m) |
| 550 | m = 1; |
| 551 | nr_pages = 0; |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 552 | start = ktime_get(); |
Jiri Slaby | 4ff277f | 2009-10-28 22:55:33 +0100 | [diff] [blame] | 553 | while (1) { |
Jiri Slaby | d3c1b24 | 2010-05-01 23:52:02 +0200 | [diff] [blame] | 554 | ret = snapshot_read_next(snapshot); |
Jiri Slaby | 4ff277f | 2009-10-28 22:55:33 +0100 | [diff] [blame] | 555 | if (ret <= 0) |
| 556 | break; |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 557 | ret = swap_write_page(handle, data_of(*snapshot), &hb); |
Jiri Slaby | 4ff277f | 2009-10-28 22:55:33 +0100 | [diff] [blame] | 558 | if (ret) |
| 559 | break; |
| 560 | if (!(nr_pages % m)) |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 561 | printk(KERN_INFO "PM: Image saving progress: %3d%%\n", |
| 562 | nr_pages / m * 10); |
Jiri Slaby | 4ff277f | 2009-10-28 22:55:33 +0100 | [diff] [blame] | 563 | nr_pages++; |
| 564 | } |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 565 | err2 = hib_wait_io(&hb); |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 566 | stop = ktime_get(); |
Jiri Slaby | 4ff277f | 2009-10-28 22:55:33 +0100 | [diff] [blame] | 567 | if (!ret) |
| 568 | ret = err2; |
| 569 | if (!ret) |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 570 | printk(KERN_INFO "PM: Image saving done.\n"); |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 571 | swsusp_show_speed(start, stop, nr_to_write, "Wrote"); |
Jiri Slaby | 4ff277f | 2009-10-28 22:55:33 +0100 | [diff] [blame] | 572 | return ret; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 573 | } |
| 574 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 575 | /** |
| 576 | * Structure used for CRC32. |
| 577 | */ |
| 578 | struct crc_data { |
| 579 | struct task_struct *thr; /* thread */ |
| 580 | atomic_t ready; /* ready to start flag */ |
| 581 | atomic_t stop; /* ready to stop flag */ |
| 582 | unsigned run_threads; /* nr current threads */ |
| 583 | wait_queue_head_t go; /* start crc update */ |
| 584 | wait_queue_head_t done; /* crc update done */ |
| 585 | u32 *crc32; /* points to handle's crc32 */ |
| 586 | size_t *unc_len[LZO_THREADS]; /* uncompressed lengths */ |
| 587 | unsigned char *unc[LZO_THREADS]; /* uncompressed data */ |
| 588 | }; |
| 589 | |
| 590 | /** |
| 591 | * CRC32 update function that runs in its own thread. |
| 592 | */ |
| 593 | static int crc32_threadfn(void *data) |
| 594 | { |
| 595 | struct crc_data *d = data; |
| 596 | unsigned i; |
| 597 | |
| 598 | while (1) { |
| 599 | wait_event(d->go, atomic_read(&d->ready) || |
| 600 | kthread_should_stop()); |
| 601 | if (kthread_should_stop()) { |
| 602 | d->thr = NULL; |
| 603 | atomic_set(&d->stop, 1); |
| 604 | wake_up(&d->done); |
| 605 | break; |
| 606 | } |
| 607 | atomic_set(&d->ready, 0); |
| 608 | |
| 609 | for (i = 0; i < d->run_threads; i++) |
| 610 | *d->crc32 = crc32_le(*d->crc32, |
| 611 | d->unc[i], *d->unc_len[i]); |
| 612 | atomic_set(&d->stop, 1); |
| 613 | wake_up(&d->done); |
| 614 | } |
| 615 | return 0; |
| 616 | } |
| 617 | /** |
| 618 | * Structure used for LZO data compression. |
| 619 | */ |
| 620 | struct cmp_data { |
| 621 | struct task_struct *thr; /* thread */ |
| 622 | atomic_t ready; /* ready to start flag */ |
| 623 | atomic_t stop; /* ready to stop flag */ |
| 624 | int ret; /* return code */ |
| 625 | wait_queue_head_t go; /* start compression */ |
| 626 | wait_queue_head_t done; /* compression done */ |
| 627 | size_t unc_len; /* uncompressed length */ |
| 628 | size_t cmp_len; /* compressed length */ |
| 629 | unsigned char unc[LZO_UNC_SIZE]; /* uncompressed buffer */ |
| 630 | unsigned char cmp[LZO_CMP_SIZE]; /* compressed buffer */ |
| 631 | unsigned char wrk[LZO1X_1_MEM_COMPRESS]; /* compression workspace */ |
| 632 | }; |
| 633 | |
| 634 | /** |
| 635 | * Compression function that runs in its own thread. |
| 636 | */ |
| 637 | static int lzo_compress_threadfn(void *data) |
| 638 | { |
| 639 | struct cmp_data *d = data; |
| 640 | |
| 641 | while (1) { |
| 642 | wait_event(d->go, atomic_read(&d->ready) || |
| 643 | kthread_should_stop()); |
| 644 | if (kthread_should_stop()) { |
| 645 | d->thr = NULL; |
| 646 | d->ret = -1; |
| 647 | atomic_set(&d->stop, 1); |
| 648 | wake_up(&d->done); |
| 649 | break; |
| 650 | } |
| 651 | atomic_set(&d->ready, 0); |
| 652 | |
| 653 | d->ret = lzo1x_1_compress(d->unc, d->unc_len, |
| 654 | d->cmp + LZO_HEADER, &d->cmp_len, |
| 655 | d->wrk); |
| 656 | atomic_set(&d->stop, 1); |
| 657 | wake_up(&d->done); |
| 658 | } |
| 659 | return 0; |
| 660 | } |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 661 | |
| 662 | /** |
| 663 | * save_image_lzo - Save the suspend image data compressed with LZO. |
Niv Yehezkel | 057b0a7 | 2014-05-31 06:26:01 -0400 | [diff] [blame] | 664 | * @handle: Swap map handle to use for saving the image. |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 665 | * @snapshot: Image to read data from. |
| 666 | * @nr_to_write: Number of pages to save. |
| 667 | */ |
| 668 | static int save_image_lzo(struct swap_map_handle *handle, |
| 669 | struct snapshot_handle *snapshot, |
| 670 | unsigned int nr_to_write) |
| 671 | { |
| 672 | unsigned int m; |
| 673 | int ret = 0; |
| 674 | int nr_pages; |
| 675 | int err2; |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 676 | struct hib_bio_batch hb; |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 677 | ktime_t start; |
| 678 | ktime_t stop; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 679 | size_t off; |
| 680 | unsigned thr, run_threads, nr_threads; |
| 681 | unsigned char *page = NULL; |
| 682 | struct cmp_data *data = NULL; |
| 683 | struct crc_data *crc = NULL; |
| 684 | |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 685 | hib_init_batch(&hb); |
| 686 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 687 | /* |
| 688 | * We'll limit the number of threads for compression to limit memory |
| 689 | * footprint. |
| 690 | */ |
| 691 | nr_threads = num_online_cpus() - 1; |
| 692 | nr_threads = clamp_val(nr_threads, 1, LZO_THREADS); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 693 | |
Mel Gorman | 71baba4 | 2015-11-06 16:28:28 -0800 | [diff] [blame] | 694 | page = (void *)__get_free_page(__GFP_RECLAIM | __GFP_HIGH); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 695 | if (!page) { |
| 696 | printk(KERN_ERR "PM: Failed to allocate LZO page\n"); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 697 | ret = -ENOMEM; |
| 698 | goto out_clean; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 699 | } |
| 700 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 701 | data = vmalloc(sizeof(*data) * nr_threads); |
| 702 | if (!data) { |
| 703 | printk(KERN_ERR "PM: Failed to allocate LZO data\n"); |
| 704 | ret = -ENOMEM; |
| 705 | goto out_clean; |
| 706 | } |
| 707 | for (thr = 0; thr < nr_threads; thr++) |
| 708 | memset(&data[thr], 0, offsetof(struct cmp_data, go)); |
| 709 | |
| 710 | crc = kmalloc(sizeof(*crc), GFP_KERNEL); |
| 711 | if (!crc) { |
| 712 | printk(KERN_ERR "PM: Failed to allocate crc\n"); |
| 713 | ret = -ENOMEM; |
| 714 | goto out_clean; |
| 715 | } |
| 716 | memset(crc, 0, offsetof(struct crc_data, go)); |
| 717 | |
| 718 | /* |
| 719 | * Start the compression threads. |
| 720 | */ |
| 721 | for (thr = 0; thr < nr_threads; thr++) { |
| 722 | init_waitqueue_head(&data[thr].go); |
| 723 | init_waitqueue_head(&data[thr].done); |
| 724 | |
| 725 | data[thr].thr = kthread_run(lzo_compress_threadfn, |
| 726 | &data[thr], |
| 727 | "image_compress/%u", thr); |
| 728 | if (IS_ERR(data[thr].thr)) { |
| 729 | data[thr].thr = NULL; |
| 730 | printk(KERN_ERR |
| 731 | "PM: Cannot start compression threads\n"); |
| 732 | ret = -ENOMEM; |
| 733 | goto out_clean; |
| 734 | } |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 735 | } |
| 736 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 737 | /* |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 738 | * Start the CRC32 thread. |
| 739 | */ |
| 740 | init_waitqueue_head(&crc->go); |
| 741 | init_waitqueue_head(&crc->done); |
| 742 | |
| 743 | handle->crc32 = 0; |
| 744 | crc->crc32 = &handle->crc32; |
| 745 | for (thr = 0; thr < nr_threads; thr++) { |
| 746 | crc->unc[thr] = data[thr].unc; |
| 747 | crc->unc_len[thr] = &data[thr].unc_len; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 748 | } |
| 749 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 750 | crc->thr = kthread_run(crc32_threadfn, crc, "image_crc32"); |
| 751 | if (IS_ERR(crc->thr)) { |
| 752 | crc->thr = NULL; |
| 753 | printk(KERN_ERR "PM: Cannot start CRC32 thread\n"); |
| 754 | ret = -ENOMEM; |
| 755 | goto out_clean; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 756 | } |
| 757 | |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 758 | /* |
| 759 | * Adjust the number of required free pages after all allocations have |
| 760 | * been done. We don't want to run out of pages when writing. |
| 761 | */ |
| 762 | handle->reqd_free_pages = reqd_free_pages(); |
| 763 | |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 764 | printk(KERN_INFO |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 765 | "PM: Using %u thread(s) for compression.\n" |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 766 | "PM: Compressing and saving image data (%u pages)...\n", |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 767 | nr_threads, nr_to_write); |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 768 | m = nr_to_write / 10; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 769 | if (!m) |
| 770 | m = 1; |
| 771 | nr_pages = 0; |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 772 | start = ktime_get(); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 773 | for (;;) { |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 774 | for (thr = 0; thr < nr_threads; thr++) { |
| 775 | for (off = 0; off < LZO_UNC_SIZE; off += PAGE_SIZE) { |
| 776 | ret = snapshot_read_next(snapshot); |
| 777 | if (ret < 0) |
| 778 | goto out_finish; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 779 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 780 | if (!ret) |
| 781 | break; |
| 782 | |
| 783 | memcpy(data[thr].unc + off, |
| 784 | data_of(*snapshot), PAGE_SIZE); |
| 785 | |
| 786 | if (!(nr_pages % m)) |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 787 | printk(KERN_INFO |
| 788 | "PM: Image saving progress: " |
| 789 | "%3d%%\n", |
| 790 | nr_pages / m * 10); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 791 | nr_pages++; |
| 792 | } |
| 793 | if (!off) |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 794 | break; |
| 795 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 796 | data[thr].unc_len = off; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 797 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 798 | atomic_set(&data[thr].ready, 1); |
| 799 | wake_up(&data[thr].go); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 800 | } |
| 801 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 802 | if (!thr) |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 803 | break; |
| 804 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 805 | crc->run_threads = thr; |
| 806 | atomic_set(&crc->ready, 1); |
| 807 | wake_up(&crc->go); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 808 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 809 | for (run_threads = thr, thr = 0; thr < run_threads; thr++) { |
| 810 | wait_event(data[thr].done, |
| 811 | atomic_read(&data[thr].stop)); |
| 812 | atomic_set(&data[thr].stop, 0); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 813 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 814 | ret = data[thr].ret; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 815 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 816 | if (ret < 0) { |
| 817 | printk(KERN_ERR "PM: LZO compression failed\n"); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 818 | goto out_finish; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 819 | } |
| 820 | |
| 821 | if (unlikely(!data[thr].cmp_len || |
| 822 | data[thr].cmp_len > |
| 823 | lzo1x_worst_compress(data[thr].unc_len))) { |
| 824 | printk(KERN_ERR |
| 825 | "PM: Invalid LZO compressed length\n"); |
| 826 | ret = -1; |
| 827 | goto out_finish; |
| 828 | } |
| 829 | |
| 830 | *(size_t *)data[thr].cmp = data[thr].cmp_len; |
| 831 | |
| 832 | /* |
| 833 | * Given we are writing one page at a time to disk, we |
| 834 | * copy that much from the buffer, although the last |
| 835 | * bit will likely be smaller than full page. This is |
| 836 | * OK - we saved the length of the compressed data, so |
| 837 | * any garbage at the end will be discarded when we |
| 838 | * read it. |
| 839 | */ |
| 840 | for (off = 0; |
| 841 | off < LZO_HEADER + data[thr].cmp_len; |
| 842 | off += PAGE_SIZE) { |
| 843 | memcpy(page, data[thr].cmp + off, PAGE_SIZE); |
| 844 | |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 845 | ret = swap_write_page(handle, page, &hb); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 846 | if (ret) |
| 847 | goto out_finish; |
| 848 | } |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 849 | } |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 850 | |
| 851 | wait_event(crc->done, atomic_read(&crc->stop)); |
| 852 | atomic_set(&crc->stop, 0); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 853 | } |
| 854 | |
| 855 | out_finish: |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 856 | err2 = hib_wait_io(&hb); |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 857 | stop = ktime_get(); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 858 | if (!ret) |
| 859 | ret = err2; |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 860 | if (!ret) |
| 861 | printk(KERN_INFO "PM: Image saving done.\n"); |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 862 | swsusp_show_speed(start, stop, nr_to_write, "Wrote"); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 863 | out_clean: |
| 864 | if (crc) { |
| 865 | if (crc->thr) |
| 866 | kthread_stop(crc->thr); |
| 867 | kfree(crc); |
| 868 | } |
| 869 | if (data) { |
| 870 | for (thr = 0; thr < nr_threads; thr++) |
| 871 | if (data[thr].thr) |
| 872 | kthread_stop(data[thr].thr); |
| 873 | vfree(data); |
| 874 | } |
| 875 | if (page) free_page((unsigned long)page); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 876 | |
| 877 | return ret; |
| 878 | } |
| 879 | |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 880 | /** |
| 881 | * enough_swap - Make sure we have enough swap to save the image. |
| 882 | * |
| 883 | * Returns TRUE or FALSE after checking the total amount of swap |
| 884 | * space avaiable from the resume partition. |
| 885 | */ |
| 886 | |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 887 | static int enough_swap(unsigned int nr_pages, unsigned int flags) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 888 | { |
| 889 | unsigned int free_swap = count_swap_pages(root_swap, 1); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 890 | unsigned int required; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 891 | |
Rafael J. Wysocki | 2397672 | 2007-12-08 02:09:43 +0100 | [diff] [blame] | 892 | pr_debug("PM: Free swap pages: %u\n", free_swap); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 893 | |
Barry Song | ee34a37 | 2012-01-09 12:56:23 +0800 | [diff] [blame] | 894 | required = PAGES_FOR_IO + nr_pages; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 895 | return free_swap > required; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 896 | } |
| 897 | |
| 898 | /** |
| 899 | * swsusp_write - Write entire image and metadata. |
Rafael J. Wysocki | a634cc1 | 2007-07-19 01:47:30 -0700 | [diff] [blame] | 900 | * @flags: flags to pass to the "boot" kernel in the image header |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 901 | * |
| 902 | * It is important _NOT_ to umount filesystems at this point. We want |
| 903 | * them synced (in case something goes wrong) but we DO not want to mark |
| 904 | * filesystem clean: it is not. (And it does not matter, if we resume |
| 905 | * correctly, we'll mark system clean, anyway.) |
| 906 | */ |
| 907 | |
Rafael J. Wysocki | a634cc1 | 2007-07-19 01:47:30 -0700 | [diff] [blame] | 908 | int swsusp_write(unsigned int flags) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 909 | { |
| 910 | struct swap_map_handle handle; |
| 911 | struct snapshot_handle snapshot; |
| 912 | struct swsusp_info *header; |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 913 | unsigned long pages; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 914 | int error; |
| 915 | |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 916 | pages = snapshot_get_image_size(); |
| 917 | error = get_swap_writer(&handle); |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 918 | if (error) { |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 919 | printk(KERN_ERR "PM: Cannot get swap writer\n"); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 920 | return error; |
| 921 | } |
Barry Song | ee34a37 | 2012-01-09 12:56:23 +0800 | [diff] [blame] | 922 | if (flags & SF_NOCOMPRESS_MODE) { |
| 923 | if (!enough_swap(pages, flags)) { |
| 924 | printk(KERN_ERR "PM: Not enough free swap\n"); |
| 925 | error = -ENOSPC; |
| 926 | goto out_finish; |
| 927 | } |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 928 | } |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 929 | memset(&snapshot, 0, sizeof(struct snapshot_handle)); |
Jiri Slaby | d3c1b24 | 2010-05-01 23:52:02 +0200 | [diff] [blame] | 930 | error = snapshot_read_next(&snapshot); |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 931 | if (error < PAGE_SIZE) { |
| 932 | if (error >= 0) |
| 933 | error = -EFAULT; |
| 934 | |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 935 | goto out_finish; |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 936 | } |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 937 | header = (struct swsusp_info *)data_of(snapshot); |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 938 | error = swap_write_page(&handle, header, NULL); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 939 | if (!error) { |
| 940 | error = (flags & SF_NOCOMPRESS_MODE) ? |
| 941 | save_image(&handle, &snapshot, pages - 1) : |
| 942 | save_image_lzo(&handle, &snapshot, pages - 1); |
| 943 | } |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 944 | out_finish: |
| 945 | error = swap_writer_finish(&handle, flags, error); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 946 | return error; |
| 947 | } |
| 948 | |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 949 | /** |
| 950 | * The following functions allow us to read data using a swap map |
| 951 | * in a file-alike way |
| 952 | */ |
| 953 | |
| 954 | static void release_swap_reader(struct swap_map_handle *handle) |
| 955 | { |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 956 | struct swap_map_page_list *tmp; |
| 957 | |
| 958 | while (handle->maps) { |
| 959 | if (handle->maps->map) |
| 960 | free_page((unsigned long)handle->maps->map); |
| 961 | tmp = handle->maps; |
| 962 | handle->maps = handle->maps->next; |
| 963 | kfree(tmp); |
| 964 | } |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 965 | handle->cur = NULL; |
| 966 | } |
| 967 | |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 968 | static int get_swap_reader(struct swap_map_handle *handle, |
| 969 | unsigned int *flags_p) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 970 | { |
| 971 | int error; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 972 | struct swap_map_page_list *tmp, *last; |
| 973 | sector_t offset; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 974 | |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 975 | *flags_p = swsusp_header->flags; |
| 976 | |
| 977 | if (!swsusp_header->image) /* how can this happen? */ |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 978 | return -EINVAL; |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 979 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 980 | handle->cur = NULL; |
| 981 | last = handle->maps = NULL; |
| 982 | offset = swsusp_header->image; |
| 983 | while (offset) { |
| 984 | tmp = kmalloc(sizeof(*handle->maps), GFP_KERNEL); |
| 985 | if (!tmp) { |
| 986 | release_swap_reader(handle); |
| 987 | return -ENOMEM; |
| 988 | } |
| 989 | memset(tmp, 0, sizeof(*tmp)); |
| 990 | if (!handle->maps) |
| 991 | handle->maps = tmp; |
| 992 | if (last) |
| 993 | last->next = tmp; |
| 994 | last = tmp; |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 995 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 996 | tmp->map = (struct swap_map_page *) |
Mel Gorman | 71baba4 | 2015-11-06 16:28:28 -0800 | [diff] [blame] | 997 | __get_free_page(__GFP_RECLAIM | __GFP_HIGH); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 998 | if (!tmp->map) { |
| 999 | release_swap_reader(handle); |
| 1000 | return -ENOMEM; |
| 1001 | } |
| 1002 | |
Mike Christie | 162b99e | 2016-06-05 14:32:02 -0500 | [diff] [blame] | 1003 | error = hib_submit_io(REQ_OP_READ, READ_SYNC, offset, |
| 1004 | tmp->map, NULL); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1005 | if (error) { |
| 1006 | release_swap_reader(handle); |
| 1007 | return error; |
| 1008 | } |
| 1009 | offset = tmp->map->next_swap; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1010 | } |
| 1011 | handle->k = 0; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1012 | handle->cur = handle->maps->map; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1013 | return 0; |
| 1014 | } |
| 1015 | |
Andrew Morton | 546e0d2 | 2006-09-25 23:32:44 -0700 | [diff] [blame] | 1016 | static int swap_read_page(struct swap_map_handle *handle, void *buf, |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 1017 | struct hib_bio_batch *hb) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1018 | { |
Rafael J. Wysocki | 3aef83e | 2006-12-06 20:34:10 -0800 | [diff] [blame] | 1019 | sector_t offset; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1020 | int error; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1021 | struct swap_map_page_list *tmp; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1022 | |
| 1023 | if (!handle->cur) |
| 1024 | return -EINVAL; |
| 1025 | offset = handle->cur->entries[handle->k]; |
| 1026 | if (!offset) |
| 1027 | return -EFAULT; |
Mike Christie | 162b99e | 2016-06-05 14:32:02 -0500 | [diff] [blame] | 1028 | error = hib_submit_io(REQ_OP_READ, READ_SYNC, offset, buf, hb); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1029 | if (error) |
| 1030 | return error; |
| 1031 | if (++handle->k >= MAP_PAGE_ENTRIES) { |
| 1032 | handle->k = 0; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1033 | free_page((unsigned long)handle->maps->map); |
| 1034 | tmp = handle->maps; |
| 1035 | handle->maps = handle->maps->next; |
| 1036 | kfree(tmp); |
| 1037 | if (!handle->maps) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1038 | release_swap_reader(handle); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1039 | else |
| 1040 | handle->cur = handle->maps->map; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1041 | } |
| 1042 | return error; |
| 1043 | } |
| 1044 | |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 1045 | static int swap_reader_finish(struct swap_map_handle *handle) |
| 1046 | { |
| 1047 | release_swap_reader(handle); |
| 1048 | |
| 1049 | return 0; |
| 1050 | } |
| 1051 | |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1052 | /** |
| 1053 | * load_image - load the image using the swap map handle |
| 1054 | * @handle and the snapshot handle @snapshot |
| 1055 | * (assume there are @nr_pages pages to load) |
| 1056 | */ |
| 1057 | |
| 1058 | static int load_image(struct swap_map_handle *handle, |
| 1059 | struct snapshot_handle *snapshot, |
Andrew Morton | 546e0d2 | 2006-09-25 23:32:44 -0700 | [diff] [blame] | 1060 | unsigned int nr_to_read) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1061 | { |
| 1062 | unsigned int m; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1063 | int ret = 0; |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 1064 | ktime_t start; |
| 1065 | ktime_t stop; |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 1066 | struct hib_bio_batch hb; |
Andrew Morton | 546e0d2 | 2006-09-25 23:32:44 -0700 | [diff] [blame] | 1067 | int err2; |
| 1068 | unsigned nr_pages; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1069 | |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 1070 | hib_init_batch(&hb); |
| 1071 | |
James Morse | f6cf054 | 2016-04-27 17:47:11 +0100 | [diff] [blame] | 1072 | clean_pages_on_read = true; |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 1073 | printk(KERN_INFO "PM: Loading image data pages (%u pages)...\n", |
Rafael J. Wysocki | 2397672 | 2007-12-08 02:09:43 +0100 | [diff] [blame] | 1074 | nr_to_read); |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 1075 | m = nr_to_read / 10; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1076 | if (!m) |
| 1077 | m = 1; |
| 1078 | nr_pages = 0; |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 1079 | start = ktime_get(); |
Andrew Morton | 546e0d2 | 2006-09-25 23:32:44 -0700 | [diff] [blame] | 1080 | for ( ; ; ) { |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1081 | ret = snapshot_write_next(snapshot); |
| 1082 | if (ret <= 0) |
Andrew Morton | 546e0d2 | 2006-09-25 23:32:44 -0700 | [diff] [blame] | 1083 | break; |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 1084 | ret = swap_read_page(handle, data_of(*snapshot), &hb); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1085 | if (ret) |
Andrew Morton | 546e0d2 | 2006-09-25 23:32:44 -0700 | [diff] [blame] | 1086 | break; |
| 1087 | if (snapshot->sync_read) |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 1088 | ret = hib_wait_io(&hb); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1089 | if (ret) |
Andrew Morton | 546e0d2 | 2006-09-25 23:32:44 -0700 | [diff] [blame] | 1090 | break; |
| 1091 | if (!(nr_pages % m)) |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 1092 | printk(KERN_INFO "PM: Image loading progress: %3d%%\n", |
| 1093 | nr_pages / m * 10); |
Andrew Morton | 546e0d2 | 2006-09-25 23:32:44 -0700 | [diff] [blame] | 1094 | nr_pages++; |
| 1095 | } |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 1096 | err2 = hib_wait_io(&hb); |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 1097 | stop = ktime_get(); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1098 | if (!ret) |
| 1099 | ret = err2; |
| 1100 | if (!ret) { |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 1101 | printk(KERN_INFO "PM: Image loading done.\n"); |
Rafael J. Wysocki | 8357376 | 2006-12-06 20:34:18 -0800 | [diff] [blame] | 1102 | snapshot_write_finalize(snapshot); |
Con Kolivas | e655a25 | 2006-03-26 01:37:11 -0800 | [diff] [blame] | 1103 | if (!snapshot_image_loaded(snapshot)) |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1104 | ret = -ENODATA; |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 1105 | } |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 1106 | swsusp_show_speed(start, stop, nr_to_read, "Read"); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1107 | return ret; |
| 1108 | } |
| 1109 | |
| 1110 | /** |
| 1111 | * Structure used for LZO data decompression. |
| 1112 | */ |
| 1113 | struct dec_data { |
| 1114 | struct task_struct *thr; /* thread */ |
| 1115 | atomic_t ready; /* ready to start flag */ |
| 1116 | atomic_t stop; /* ready to stop flag */ |
| 1117 | int ret; /* return code */ |
| 1118 | wait_queue_head_t go; /* start decompression */ |
| 1119 | wait_queue_head_t done; /* decompression done */ |
| 1120 | size_t unc_len; /* uncompressed length */ |
| 1121 | size_t cmp_len; /* compressed length */ |
| 1122 | unsigned char unc[LZO_UNC_SIZE]; /* uncompressed buffer */ |
| 1123 | unsigned char cmp[LZO_CMP_SIZE]; /* compressed buffer */ |
| 1124 | }; |
| 1125 | |
| 1126 | /** |
| 1127 | * Deompression function that runs in its own thread. |
| 1128 | */ |
| 1129 | static int lzo_decompress_threadfn(void *data) |
| 1130 | { |
| 1131 | struct dec_data *d = data; |
| 1132 | |
| 1133 | while (1) { |
| 1134 | wait_event(d->go, atomic_read(&d->ready) || |
| 1135 | kthread_should_stop()); |
| 1136 | if (kthread_should_stop()) { |
| 1137 | d->thr = NULL; |
| 1138 | d->ret = -1; |
| 1139 | atomic_set(&d->stop, 1); |
| 1140 | wake_up(&d->done); |
| 1141 | break; |
| 1142 | } |
| 1143 | atomic_set(&d->ready, 0); |
| 1144 | |
| 1145 | d->unc_len = LZO_UNC_SIZE; |
| 1146 | d->ret = lzo1x_decompress_safe(d->cmp + LZO_HEADER, d->cmp_len, |
| 1147 | d->unc, &d->unc_len); |
James Morse | f6cf054 | 2016-04-27 17:47:11 +0100 | [diff] [blame] | 1148 | if (clean_pages_on_decompress) |
| 1149 | flush_icache_range((unsigned long)d->unc, |
| 1150 | (unsigned long)d->unc + d->unc_len); |
| 1151 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1152 | atomic_set(&d->stop, 1); |
| 1153 | wake_up(&d->done); |
| 1154 | } |
| 1155 | return 0; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1156 | } |
| 1157 | |
Rafael J. Wysocki | a634cc1 | 2007-07-19 01:47:30 -0700 | [diff] [blame] | 1158 | /** |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1159 | * load_image_lzo - Load compressed image data and decompress them with LZO. |
| 1160 | * @handle: Swap map handle to use for loading data. |
| 1161 | * @snapshot: Image to copy uncompressed data into. |
| 1162 | * @nr_to_read: Number of pages to load. |
| 1163 | */ |
| 1164 | static int load_image_lzo(struct swap_map_handle *handle, |
| 1165 | struct snapshot_handle *snapshot, |
| 1166 | unsigned int nr_to_read) |
| 1167 | { |
| 1168 | unsigned int m; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1169 | int ret = 0; |
| 1170 | int eof = 0; |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 1171 | struct hib_bio_batch hb; |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 1172 | ktime_t start; |
| 1173 | ktime_t stop; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1174 | unsigned nr_pages; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1175 | size_t off; |
| 1176 | unsigned i, thr, run_threads, nr_threads; |
| 1177 | unsigned ring = 0, pg = 0, ring_size = 0, |
| 1178 | have = 0, want, need, asked = 0; |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 1179 | unsigned long read_pages = 0; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1180 | unsigned char **page = NULL; |
| 1181 | struct dec_data *data = NULL; |
| 1182 | struct crc_data *crc = NULL; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1183 | |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 1184 | hib_init_batch(&hb); |
| 1185 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1186 | /* |
| 1187 | * We'll limit the number of threads for decompression to limit memory |
| 1188 | * footprint. |
| 1189 | */ |
| 1190 | nr_threads = num_online_cpus() - 1; |
| 1191 | nr_threads = clamp_val(nr_threads, 1, LZO_THREADS); |
Bojan Smojver | 9f339ca | 2010-11-25 23:41:39 +0100 | [diff] [blame] | 1192 | |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 1193 | page = vmalloc(sizeof(*page) * LZO_MAX_RD_PAGES); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1194 | if (!page) { |
| 1195 | printk(KERN_ERR "PM: Failed to allocate LZO page\n"); |
| 1196 | ret = -ENOMEM; |
| 1197 | goto out_clean; |
| 1198 | } |
Bojan Smojver | 9f339ca | 2010-11-25 23:41:39 +0100 | [diff] [blame] | 1199 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1200 | data = vmalloc(sizeof(*data) * nr_threads); |
| 1201 | if (!data) { |
| 1202 | printk(KERN_ERR "PM: Failed to allocate LZO data\n"); |
| 1203 | ret = -ENOMEM; |
| 1204 | goto out_clean; |
| 1205 | } |
| 1206 | for (thr = 0; thr < nr_threads; thr++) |
| 1207 | memset(&data[thr], 0, offsetof(struct dec_data, go)); |
| 1208 | |
| 1209 | crc = kmalloc(sizeof(*crc), GFP_KERNEL); |
| 1210 | if (!crc) { |
| 1211 | printk(KERN_ERR "PM: Failed to allocate crc\n"); |
| 1212 | ret = -ENOMEM; |
| 1213 | goto out_clean; |
| 1214 | } |
| 1215 | memset(crc, 0, offsetof(struct crc_data, go)); |
| 1216 | |
James Morse | f6cf054 | 2016-04-27 17:47:11 +0100 | [diff] [blame] | 1217 | clean_pages_on_decompress = true; |
| 1218 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1219 | /* |
| 1220 | * Start the decompression threads. |
| 1221 | */ |
| 1222 | for (thr = 0; thr < nr_threads; thr++) { |
| 1223 | init_waitqueue_head(&data[thr].go); |
| 1224 | init_waitqueue_head(&data[thr].done); |
| 1225 | |
| 1226 | data[thr].thr = kthread_run(lzo_decompress_threadfn, |
| 1227 | &data[thr], |
| 1228 | "image_decompress/%u", thr); |
| 1229 | if (IS_ERR(data[thr].thr)) { |
| 1230 | data[thr].thr = NULL; |
| 1231 | printk(KERN_ERR |
| 1232 | "PM: Cannot start decompression threads\n"); |
| 1233 | ret = -ENOMEM; |
| 1234 | goto out_clean; |
Bojan Smojver | 9f339ca | 2010-11-25 23:41:39 +0100 | [diff] [blame] | 1235 | } |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1236 | } |
| 1237 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1238 | /* |
| 1239 | * Start the CRC32 thread. |
| 1240 | */ |
| 1241 | init_waitqueue_head(&crc->go); |
| 1242 | init_waitqueue_head(&crc->done); |
Bojan Smojver | 9f339ca | 2010-11-25 23:41:39 +0100 | [diff] [blame] | 1243 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1244 | handle->crc32 = 0; |
| 1245 | crc->crc32 = &handle->crc32; |
| 1246 | for (thr = 0; thr < nr_threads; thr++) { |
| 1247 | crc->unc[thr] = data[thr].unc; |
| 1248 | crc->unc_len[thr] = &data[thr].unc_len; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1249 | } |
| 1250 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1251 | crc->thr = kthread_run(crc32_threadfn, crc, "image_crc32"); |
| 1252 | if (IS_ERR(crc->thr)) { |
| 1253 | crc->thr = NULL; |
| 1254 | printk(KERN_ERR "PM: Cannot start CRC32 thread\n"); |
| 1255 | ret = -ENOMEM; |
| 1256 | goto out_clean; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1257 | } |
| 1258 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1259 | /* |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 1260 | * Set the number of pages for read buffering. |
| 1261 | * This is complete guesswork, because we'll only know the real |
| 1262 | * picture once prepare_image() is called, which is much later on |
| 1263 | * during the image load phase. We'll assume the worst case and |
| 1264 | * say that none of the image pages are from high memory. |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1265 | */ |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 1266 | if (low_free_pages() > snapshot_get_image_size()) |
| 1267 | read_pages = (low_free_pages() - snapshot_get_image_size()) / 2; |
| 1268 | read_pages = clamp_val(read_pages, LZO_MIN_RD_PAGES, LZO_MAX_RD_PAGES); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1269 | |
| 1270 | for (i = 0; i < read_pages; i++) { |
| 1271 | page[i] = (void *)__get_free_page(i < LZO_CMP_PAGES ? |
Mel Gorman | 71baba4 | 2015-11-06 16:28:28 -0800 | [diff] [blame] | 1272 | __GFP_RECLAIM | __GFP_HIGH : |
| 1273 | __GFP_RECLAIM | __GFP_NOWARN | |
| 1274 | __GFP_NORETRY); |
Bojan Smojver | 5a21d489 | 2012-04-29 22:42:06 +0200 | [diff] [blame] | 1275 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1276 | if (!page[i]) { |
| 1277 | if (i < LZO_CMP_PAGES) { |
| 1278 | ring_size = i; |
| 1279 | printk(KERN_ERR |
| 1280 | "PM: Failed to allocate LZO pages\n"); |
| 1281 | ret = -ENOMEM; |
| 1282 | goto out_clean; |
| 1283 | } else { |
| 1284 | break; |
| 1285 | } |
| 1286 | } |
| 1287 | } |
| 1288 | want = ring_size = i; |
| 1289 | |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1290 | printk(KERN_INFO |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1291 | "PM: Using %u thread(s) for decompression.\n" |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 1292 | "PM: Loading and decompressing image data (%u pages)...\n", |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1293 | nr_threads, nr_to_read); |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 1294 | m = nr_to_read / 10; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1295 | if (!m) |
| 1296 | m = 1; |
| 1297 | nr_pages = 0; |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 1298 | start = ktime_get(); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1299 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1300 | ret = snapshot_write_next(snapshot); |
| 1301 | if (ret <= 0) |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1302 | goto out_finish; |
| 1303 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1304 | for(;;) { |
| 1305 | for (i = 0; !eof && i < want; i++) { |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 1306 | ret = swap_read_page(handle, page[ring], &hb); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1307 | if (ret) { |
| 1308 | /* |
| 1309 | * On real read error, finish. On end of data, |
| 1310 | * set EOF flag and just exit the read loop. |
| 1311 | */ |
| 1312 | if (handle->cur && |
| 1313 | handle->cur->entries[handle->k]) { |
| 1314 | goto out_finish; |
| 1315 | } else { |
| 1316 | eof = 1; |
| 1317 | break; |
| 1318 | } |
| 1319 | } |
| 1320 | if (++ring >= ring_size) |
| 1321 | ring = 0; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1322 | } |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1323 | asked += i; |
| 1324 | want -= i; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1325 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1326 | /* |
| 1327 | * We are out of data, wait for some more. |
| 1328 | */ |
| 1329 | if (!have) { |
| 1330 | if (!asked) |
| 1331 | break; |
| 1332 | |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 1333 | ret = hib_wait_io(&hb); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1334 | if (ret) |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1335 | goto out_finish; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1336 | have += asked; |
| 1337 | asked = 0; |
| 1338 | if (eof) |
| 1339 | eof = 2; |
Bojan Smojver | 9f339ca | 2010-11-25 23:41:39 +0100 | [diff] [blame] | 1340 | } |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1341 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1342 | if (crc->run_threads) { |
| 1343 | wait_event(crc->done, atomic_read(&crc->stop)); |
| 1344 | atomic_set(&crc->stop, 0); |
| 1345 | crc->run_threads = 0; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1346 | } |
| 1347 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1348 | for (thr = 0; have && thr < nr_threads; thr++) { |
| 1349 | data[thr].cmp_len = *(size_t *)page[pg]; |
| 1350 | if (unlikely(!data[thr].cmp_len || |
| 1351 | data[thr].cmp_len > |
| 1352 | lzo1x_worst_compress(LZO_UNC_SIZE))) { |
| 1353 | printk(KERN_ERR |
| 1354 | "PM: Invalid LZO compressed length\n"); |
| 1355 | ret = -1; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1356 | goto out_finish; |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1357 | } |
| 1358 | |
| 1359 | need = DIV_ROUND_UP(data[thr].cmp_len + LZO_HEADER, |
| 1360 | PAGE_SIZE); |
| 1361 | if (need > have) { |
| 1362 | if (eof > 1) { |
| 1363 | ret = -1; |
| 1364 | goto out_finish; |
| 1365 | } |
| 1366 | break; |
| 1367 | } |
| 1368 | |
| 1369 | for (off = 0; |
| 1370 | off < LZO_HEADER + data[thr].cmp_len; |
| 1371 | off += PAGE_SIZE) { |
| 1372 | memcpy(data[thr].cmp + off, |
| 1373 | page[pg], PAGE_SIZE); |
| 1374 | have--; |
| 1375 | want++; |
| 1376 | if (++pg >= ring_size) |
| 1377 | pg = 0; |
| 1378 | } |
| 1379 | |
| 1380 | atomic_set(&data[thr].ready, 1); |
| 1381 | wake_up(&data[thr].go); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1382 | } |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1383 | |
| 1384 | /* |
| 1385 | * Wait for more data while we are decompressing. |
| 1386 | */ |
| 1387 | if (have < LZO_CMP_PAGES && asked) { |
Christoph Hellwig | 343df3c | 2015-05-19 09:23:23 +0200 | [diff] [blame] | 1388 | ret = hib_wait_io(&hb); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1389 | if (ret) |
| 1390 | goto out_finish; |
| 1391 | have += asked; |
| 1392 | asked = 0; |
| 1393 | if (eof) |
| 1394 | eof = 2; |
| 1395 | } |
| 1396 | |
| 1397 | for (run_threads = thr, thr = 0; thr < run_threads; thr++) { |
| 1398 | wait_event(data[thr].done, |
| 1399 | atomic_read(&data[thr].stop)); |
| 1400 | atomic_set(&data[thr].stop, 0); |
| 1401 | |
| 1402 | ret = data[thr].ret; |
| 1403 | |
| 1404 | if (ret < 0) { |
| 1405 | printk(KERN_ERR |
| 1406 | "PM: LZO decompression failed\n"); |
| 1407 | goto out_finish; |
| 1408 | } |
| 1409 | |
| 1410 | if (unlikely(!data[thr].unc_len || |
| 1411 | data[thr].unc_len > LZO_UNC_SIZE || |
| 1412 | data[thr].unc_len & (PAGE_SIZE - 1))) { |
| 1413 | printk(KERN_ERR |
| 1414 | "PM: Invalid LZO uncompressed length\n"); |
| 1415 | ret = -1; |
| 1416 | goto out_finish; |
| 1417 | } |
| 1418 | |
| 1419 | for (off = 0; |
| 1420 | off < data[thr].unc_len; off += PAGE_SIZE) { |
| 1421 | memcpy(data_of(*snapshot), |
| 1422 | data[thr].unc + off, PAGE_SIZE); |
| 1423 | |
| 1424 | if (!(nr_pages % m)) |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 1425 | printk(KERN_INFO |
| 1426 | "PM: Image loading progress: " |
| 1427 | "%3d%%\n", |
| 1428 | nr_pages / m * 10); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1429 | nr_pages++; |
| 1430 | |
| 1431 | ret = snapshot_write_next(snapshot); |
| 1432 | if (ret <= 0) { |
| 1433 | crc->run_threads = thr + 1; |
| 1434 | atomic_set(&crc->ready, 1); |
| 1435 | wake_up(&crc->go); |
| 1436 | goto out_finish; |
| 1437 | } |
| 1438 | } |
| 1439 | } |
| 1440 | |
| 1441 | crc->run_threads = thr; |
| 1442 | atomic_set(&crc->ready, 1); |
| 1443 | wake_up(&crc->go); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1444 | } |
| 1445 | |
| 1446 | out_finish: |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1447 | if (crc->run_threads) { |
| 1448 | wait_event(crc->done, atomic_read(&crc->stop)); |
| 1449 | atomic_set(&crc->stop, 0); |
| 1450 | } |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 1451 | stop = ktime_get(); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1452 | if (!ret) { |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 1453 | printk(KERN_INFO "PM: Image loading done.\n"); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1454 | snapshot_write_finalize(snapshot); |
| 1455 | if (!snapshot_image_loaded(snapshot)) |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1456 | ret = -ENODATA; |
| 1457 | if (!ret) { |
| 1458 | if (swsusp_header->flags & SF_CRC32_MODE) { |
| 1459 | if(handle->crc32 != swsusp_header->crc32) { |
| 1460 | printk(KERN_ERR |
| 1461 | "PM: Invalid image CRC32!\n"); |
| 1462 | ret = -ENODATA; |
| 1463 | } |
| 1464 | } |
| 1465 | } |
Bojan Smojver | d8150d3 | 2012-06-21 22:27:24 +0200 | [diff] [blame] | 1466 | } |
Tina Ruchandani | db59760 | 2014-10-30 11:04:53 -0700 | [diff] [blame] | 1467 | swsusp_show_speed(start, stop, nr_to_read, "Read"); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1468 | out_clean: |
| 1469 | for (i = 0; i < ring_size; i++) |
Bojan Smojver | 9f339ca | 2010-11-25 23:41:39 +0100 | [diff] [blame] | 1470 | free_page((unsigned long)page[i]); |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1471 | if (crc) { |
| 1472 | if (crc->thr) |
| 1473 | kthread_stop(crc->thr); |
| 1474 | kfree(crc); |
| 1475 | } |
| 1476 | if (data) { |
| 1477 | for (thr = 0; thr < nr_threads; thr++) |
| 1478 | if (data[thr].thr) |
| 1479 | kthread_stop(data[thr].thr); |
| 1480 | vfree(data); |
| 1481 | } |
Markus Elfring | 6c45de0 | 2014-11-16 14:18:28 +0100 | [diff] [blame] | 1482 | vfree(page); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1483 | |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 1484 | return ret; |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1485 | } |
| 1486 | |
| 1487 | /** |
Rafael J. Wysocki | a634cc1 | 2007-07-19 01:47:30 -0700 | [diff] [blame] | 1488 | * swsusp_read - read the hibernation image. |
| 1489 | * @flags_p: flags passed by the "frozen" kernel in the image header should |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1490 | * be written into this memory location |
Rafael J. Wysocki | a634cc1 | 2007-07-19 01:47:30 -0700 | [diff] [blame] | 1491 | */ |
| 1492 | |
| 1493 | int swsusp_read(unsigned int *flags_p) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1494 | { |
| 1495 | int error; |
| 1496 | struct swap_map_handle handle; |
| 1497 | struct snapshot_handle snapshot; |
| 1498 | struct swsusp_info *header; |
| 1499 | |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1500 | memset(&snapshot, 0, sizeof(struct snapshot_handle)); |
Jiri Slaby | d3c1b24 | 2010-05-01 23:52:02 +0200 | [diff] [blame] | 1501 | error = snapshot_write_next(&snapshot); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1502 | if (error < PAGE_SIZE) |
| 1503 | return error < 0 ? error : -EFAULT; |
| 1504 | header = (struct swsusp_info *)data_of(snapshot); |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 1505 | error = get_swap_reader(&handle, flags_p); |
| 1506 | if (error) |
| 1507 | goto end; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1508 | if (!error) |
Andrew Morton | 546e0d2 | 2006-09-25 23:32:44 -0700 | [diff] [blame] | 1509 | error = swap_read_page(&handle, header, NULL); |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 1510 | if (!error) { |
| 1511 | error = (*flags_p & SF_NOCOMPRESS_MODE) ? |
| 1512 | load_image(&handle, &snapshot, header->pages - 1) : |
| 1513 | load_image_lzo(&handle, &snapshot, header->pages - 1); |
| 1514 | } |
Jiri Slaby | 6f612af | 2010-05-01 23:54:02 +0200 | [diff] [blame] | 1515 | swap_reader_finish(&handle); |
| 1516 | end: |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1517 | if (!error) |
Rafael J. Wysocki | 2397672 | 2007-12-08 02:09:43 +0100 | [diff] [blame] | 1518 | pr_debug("PM: Image successfully loaded\n"); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1519 | else |
Rafael J. Wysocki | 2397672 | 2007-12-08 02:09:43 +0100 | [diff] [blame] | 1520 | pr_debug("PM: Error %d resuming\n", error); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1521 | return error; |
| 1522 | } |
| 1523 | |
| 1524 | /** |
| 1525 | * swsusp_check - Check for swsusp signature in the resume device |
| 1526 | */ |
| 1527 | |
| 1528 | int swsusp_check(void) |
| 1529 | { |
| 1530 | int error; |
| 1531 | |
Tejun Heo | d4d7762 | 2010-11-13 11:55:18 +0100 | [diff] [blame] | 1532 | hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, |
| 1533 | FMODE_READ, NULL); |
Jiri Slaby | 8a0d613 | 2010-05-01 23:52:34 +0200 | [diff] [blame] | 1534 | if (!IS_ERR(hib_resume_bdev)) { |
| 1535 | set_blocksize(hib_resume_bdev, PAGE_SIZE); |
Jan Beulich | 3ecb01d | 2010-10-26 14:22:27 -0700 | [diff] [blame] | 1536 | clear_page(swsusp_header); |
Mike Christie | 162b99e | 2016-06-05 14:32:02 -0500 | [diff] [blame] | 1537 | error = hib_submit_io(REQ_OP_READ, READ_SYNC, |
| 1538 | swsusp_resume_block, |
Vivek Goyal | 1b29c16 | 2007-05-02 19:27:07 +0200 | [diff] [blame] | 1539 | swsusp_header, NULL); |
Rafael J. Wysocki | 9a154d9 | 2006-12-06 20:34:12 -0800 | [diff] [blame] | 1540 | if (error) |
Jiri Slaby | 76b57e6 | 2009-10-07 22:37:35 +0200 | [diff] [blame] | 1541 | goto put; |
Rafael J. Wysocki | 9a154d9 | 2006-12-06 20:34:12 -0800 | [diff] [blame] | 1542 | |
Rafael J. Wysocki | 3624eb0 | 2010-10-04 22:08:12 +0200 | [diff] [blame] | 1543 | if (!memcmp(HIBERNATE_SIG, swsusp_header->sig, 10)) { |
Vivek Goyal | 1b29c16 | 2007-05-02 19:27:07 +0200 | [diff] [blame] | 1544 | memcpy(swsusp_header->sig, swsusp_header->orig_sig, 10); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1545 | /* Reset swap signature now */ |
Mike Christie | 162b99e | 2016-06-05 14:32:02 -0500 | [diff] [blame] | 1546 | error = hib_submit_io(REQ_OP_WRITE, WRITE_SYNC, |
| 1547 | swsusp_resume_block, |
Vivek Goyal | 1b29c16 | 2007-05-02 19:27:07 +0200 | [diff] [blame] | 1548 | swsusp_header, NULL); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1549 | } else { |
Jiri Slaby | 76b57e6 | 2009-10-07 22:37:35 +0200 | [diff] [blame] | 1550 | error = -EINVAL; |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1551 | } |
Jiri Slaby | 76b57e6 | 2009-10-07 22:37:35 +0200 | [diff] [blame] | 1552 | |
| 1553 | put: |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1554 | if (error) |
Jiri Slaby | 8a0d613 | 2010-05-01 23:52:34 +0200 | [diff] [blame] | 1555 | blkdev_put(hib_resume_bdev, FMODE_READ); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1556 | else |
Rafael J. Wysocki | d0941ea | 2010-09-28 23:31:22 +0200 | [diff] [blame] | 1557 | pr_debug("PM: Image signature found, resuming\n"); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1558 | } else { |
Jiri Slaby | 8a0d613 | 2010-05-01 23:52:34 +0200 | [diff] [blame] | 1559 | error = PTR_ERR(hib_resume_bdev); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1560 | } |
| 1561 | |
| 1562 | if (error) |
Rafael J. Wysocki | d0941ea | 2010-09-28 23:31:22 +0200 | [diff] [blame] | 1563 | pr_debug("PM: Image not found (code %d)\n", error); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1564 | |
| 1565 | return error; |
| 1566 | } |
| 1567 | |
| 1568 | /** |
| 1569 | * swsusp_close - close swap device. |
| 1570 | */ |
| 1571 | |
Al Viro | c2dd0da | 2007-10-08 13:21:10 -0400 | [diff] [blame] | 1572 | void swsusp_close(fmode_t mode) |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1573 | { |
Jiri Slaby | 8a0d613 | 2010-05-01 23:52:34 +0200 | [diff] [blame] | 1574 | if (IS_ERR(hib_resume_bdev)) { |
Rafael J. Wysocki | 2397672 | 2007-12-08 02:09:43 +0100 | [diff] [blame] | 1575 | pr_debug("PM: Image device not initialised\n"); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1576 | return; |
| 1577 | } |
| 1578 | |
Jiri Slaby | 8a0d613 | 2010-05-01 23:52:34 +0200 | [diff] [blame] | 1579 | blkdev_put(hib_resume_bdev, mode); |
Rafael J. Wysocki | 61159a3 | 2006-03-23 03:00:00 -0800 | [diff] [blame] | 1580 | } |
Vivek Goyal | 1b29c16 | 2007-05-02 19:27:07 +0200 | [diff] [blame] | 1581 | |
Bojan Smojver | 62c552c | 2012-06-16 00:09:58 +0200 | [diff] [blame] | 1582 | /** |
| 1583 | * swsusp_unmark - Unmark swsusp signature in the resume device |
| 1584 | */ |
| 1585 | |
| 1586 | #ifdef CONFIG_SUSPEND |
| 1587 | int swsusp_unmark(void) |
| 1588 | { |
| 1589 | int error; |
| 1590 | |
Mike Christie | 162b99e | 2016-06-05 14:32:02 -0500 | [diff] [blame] | 1591 | hib_submit_io(REQ_OP_READ, READ_SYNC, swsusp_resume_block, |
| 1592 | swsusp_header, NULL); |
Bojan Smojver | 62c552c | 2012-06-16 00:09:58 +0200 | [diff] [blame] | 1593 | if (!memcmp(HIBERNATE_SIG,swsusp_header->sig, 10)) { |
| 1594 | memcpy(swsusp_header->sig,swsusp_header->orig_sig, 10); |
Mike Christie | 162b99e | 2016-06-05 14:32:02 -0500 | [diff] [blame] | 1595 | error = hib_submit_io(REQ_OP_WRITE, WRITE_SYNC, |
| 1596 | swsusp_resume_block, |
Bojan Smojver | 62c552c | 2012-06-16 00:09:58 +0200 | [diff] [blame] | 1597 | swsusp_header, NULL); |
| 1598 | } else { |
| 1599 | printk(KERN_ERR "PM: Cannot find swsusp signature!\n"); |
| 1600 | error = -ENODEV; |
| 1601 | } |
| 1602 | |
| 1603 | /* |
| 1604 | * We just returned from suspend, we don't need the image any more. |
| 1605 | */ |
| 1606 | free_all_swap_pages(root_swap); |
| 1607 | |
| 1608 | return error; |
| 1609 | } |
| 1610 | #endif |
| 1611 | |
Vivek Goyal | 1b29c16 | 2007-05-02 19:27:07 +0200 | [diff] [blame] | 1612 | static int swsusp_header_init(void) |
| 1613 | { |
| 1614 | swsusp_header = (struct swsusp_header*) __get_free_page(GFP_KERNEL); |
| 1615 | if (!swsusp_header) |
| 1616 | panic("Could not allocate memory for swsusp_header\n"); |
| 1617 | return 0; |
| 1618 | } |
| 1619 | |
| 1620 | core_initcall(swsusp_header_init); |