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Commit | Line | Data |
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7eada909 MP |
1 | /* |
2 | * Copyright (C) 2016-2017 Red Hat, Inc. All rights reserved. | |
3 | * Copyright (C) 2016-2017 Milan Broz | |
4 | * Copyright (C) 2016-2017 Mikulas Patocka | |
5 | * | |
6 | * This file is released under the GPL. | |
7 | */ | |
8 | ||
248aa264 MS |
9 | #include "dm-bio-record.h" |
10 | ||
d3e632f0 | 11 | #include <linux/compiler.h> |
7eada909 MP |
12 | #include <linux/module.h> |
13 | #include <linux/device-mapper.h> | |
14 | #include <linux/dm-io.h> | |
15 | #include <linux/vmalloc.h> | |
16 | #include <linux/sort.h> | |
17 | #include <linux/rbtree.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/random.h> | |
1f5a7759 | 20 | #include <linux/reboot.h> |
7eada909 MP |
21 | #include <crypto/hash.h> |
22 | #include <crypto/skcipher.h> | |
23 | #include <linux/async_tx.h> | |
afa53df8 | 24 | #include <linux/dm-bufio.h> |
7eada909 MP |
25 | |
26 | #define DM_MSG_PREFIX "integrity" | |
27 | ||
28 | #define DEFAULT_INTERLEAVE_SECTORS 32768 | |
29 | #define DEFAULT_JOURNAL_SIZE_FACTOR 7 | |
468dfca3 | 30 | #define DEFAULT_SECTORS_PER_BITMAP_BIT 32768 |
7eada909 MP |
31 | #define DEFAULT_BUFFER_SECTORS 128 |
32 | #define DEFAULT_JOURNAL_WATERMARK 50 | |
33 | #define DEFAULT_SYNC_MSEC 10000 | |
34 | #define DEFAULT_MAX_JOURNAL_SECTORS 131072 | |
56b67a4f MP |
35 | #define MIN_LOG2_INTERLEAVE_SECTORS 3 |
36 | #define MAX_LOG2_INTERLEAVE_SECTORS 31 | |
7eada909 | 37 | #define METADATA_WORKQUEUE_MAX_ACTIVE 16 |
a3fcf725 MP |
38 | #define RECALC_SECTORS 8192 |
39 | #define RECALC_WRITE_SUPER 16 | |
468dfca3 MP |
40 | #define BITMAP_BLOCK_SIZE 4096 /* don't change it */ |
41 | #define BITMAP_FLUSH_INTERVAL (10 * HZ) | |
7eada909 MP |
42 | |
43 | /* | |
44 | * Warning - DEBUG_PRINT prints security-sensitive data to the log, | |
45 | * so it should not be enabled in the official kernel | |
46 | */ | |
47 | //#define DEBUG_PRINT | |
48 | //#define INTERNAL_VERIFY | |
49 | ||
50 | /* | |
51 | * On disk structures | |
52 | */ | |
53 | ||
54 | #define SB_MAGIC "integrt" | |
1f9fc0b8 MP |
55 | #define SB_VERSION_1 1 |
56 | #define SB_VERSION_2 2 | |
468dfca3 | 57 | #define SB_VERSION_3 3 |
d537858a | 58 | #define SB_VERSION_4 4 |
7eada909 | 59 | #define SB_SECTORS 8 |
9d609f85 | 60 | #define MAX_SECTORS_PER_BLOCK 8 |
7eada909 MP |
61 | |
62 | struct superblock { | |
63 | __u8 magic[8]; | |
64 | __u8 version; | |
65 | __u8 log2_interleave_sectors; | |
66 | __u16 integrity_tag_size; | |
67 | __u32 journal_sections; | |
68 | __u64 provided_data_sectors; /* userspace uses this value */ | |
69 | __u32 flags; | |
9d609f85 | 70 | __u8 log2_sectors_per_block; |
468dfca3 MP |
71 | __u8 log2_blocks_per_bitmap_bit; |
72 | __u8 pad[2]; | |
a3fcf725 | 73 | __u64 recalc_sector; |
7eada909 MP |
74 | }; |
75 | ||
76 | #define SB_FLAG_HAVE_JOURNAL_MAC 0x1 | |
a3fcf725 | 77 | #define SB_FLAG_RECALCULATING 0x2 |
468dfca3 | 78 | #define SB_FLAG_DIRTY_BITMAP 0x4 |
d537858a | 79 | #define SB_FLAG_FIXED_PADDING 0x8 |
7eada909 MP |
80 | |
81 | #define JOURNAL_ENTRY_ROUNDUP 8 | |
82 | ||
83 | typedef __u64 commit_id_t; | |
84 | #define JOURNAL_MAC_PER_SECTOR 8 | |
85 | ||
86 | struct journal_entry { | |
87 | union { | |
88 | struct { | |
89 | __u32 sector_lo; | |
90 | __u32 sector_hi; | |
91 | } s; | |
92 | __u64 sector; | |
93 | } u; | |
9d609f85 MP |
94 | commit_id_t last_bytes[0]; |
95 | /* __u8 tag[0]; */ | |
7eada909 MP |
96 | }; |
97 | ||
9d609f85 MP |
98 | #define journal_entry_tag(ic, je) ((__u8 *)&(je)->last_bytes[(ic)->sectors_per_block]) |
99 | ||
7eada909 | 100 | #if BITS_PER_LONG == 64 |
d3e632f0 | 101 | #define journal_entry_set_sector(je, x) do { smp_wmb(); WRITE_ONCE((je)->u.sector, cpu_to_le64(x)); } while (0) |
7eada909 | 102 | #else |
72deb455 | 103 | #define journal_entry_set_sector(je, x) do { (je)->u.s.sector_lo = cpu_to_le32(x); smp_wmb(); WRITE_ONCE((je)->u.s.sector_hi, cpu_to_le32((x) >> 32)); } while (0) |
7eada909 | 104 | #endif |
72deb455 | 105 | #define journal_entry_get_sector(je) le64_to_cpu((je)->u.sector) |
7eada909 MP |
106 | #define journal_entry_is_unused(je) ((je)->u.s.sector_hi == cpu_to_le32(-1)) |
107 | #define journal_entry_set_unused(je) do { ((je)->u.s.sector_hi = cpu_to_le32(-1)); } while (0) | |
108 | #define journal_entry_is_inprogress(je) ((je)->u.s.sector_hi == cpu_to_le32(-2)) | |
109 | #define journal_entry_set_inprogress(je) do { ((je)->u.s.sector_hi = cpu_to_le32(-2)); } while (0) | |
110 | ||
111 | #define JOURNAL_BLOCK_SECTORS 8 | |
112 | #define JOURNAL_SECTOR_DATA ((1 << SECTOR_SHIFT) - sizeof(commit_id_t)) | |
113 | #define JOURNAL_MAC_SIZE (JOURNAL_MAC_PER_SECTOR * JOURNAL_BLOCK_SECTORS) | |
114 | ||
115 | struct journal_sector { | |
116 | __u8 entries[JOURNAL_SECTOR_DATA - JOURNAL_MAC_PER_SECTOR]; | |
117 | __u8 mac[JOURNAL_MAC_PER_SECTOR]; | |
118 | commit_id_t commit_id; | |
119 | }; | |
120 | ||
9d609f85 | 121 | #define MAX_TAG_SIZE (JOURNAL_SECTOR_DATA - JOURNAL_MAC_PER_SECTOR - offsetof(struct journal_entry, last_bytes[MAX_SECTORS_PER_BLOCK])) |
7eada909 MP |
122 | |
123 | #define METADATA_PADDING_SECTORS 8 | |
124 | ||
125 | #define N_COMMIT_IDS 4 | |
126 | ||
127 | static unsigned char prev_commit_seq(unsigned char seq) | |
128 | { | |
129 | return (seq + N_COMMIT_IDS - 1) % N_COMMIT_IDS; | |
130 | } | |
131 | ||
132 | static unsigned char next_commit_seq(unsigned char seq) | |
133 | { | |
134 | return (seq + 1) % N_COMMIT_IDS; | |
135 | } | |
136 | ||
137 | /* | |
138 | * In-memory structures | |
139 | */ | |
140 | ||
141 | struct journal_node { | |
142 | struct rb_node node; | |
143 | sector_t sector; | |
144 | }; | |
145 | ||
146 | struct alg_spec { | |
147 | char *alg_string; | |
148 | char *key_string; | |
149 | __u8 *key; | |
150 | unsigned key_size; | |
151 | }; | |
152 | ||
153 | struct dm_integrity_c { | |
154 | struct dm_dev *dev; | |
356d9d52 | 155 | struct dm_dev *meta_dev; |
7eada909 MP |
156 | unsigned tag_size; |
157 | __s8 log2_tag_size; | |
158 | sector_t start; | |
6f1c819c | 159 | mempool_t journal_io_mempool; |
7eada909 MP |
160 | struct dm_io_client *io; |
161 | struct dm_bufio_client *bufio; | |
162 | struct workqueue_struct *metadata_wq; | |
163 | struct superblock *sb; | |
164 | unsigned journal_pages; | |
468dfca3 MP |
165 | unsigned n_bitmap_blocks; |
166 | ||
7eada909 MP |
167 | struct page_list *journal; |
168 | struct page_list *journal_io; | |
169 | struct page_list *journal_xor; | |
468dfca3 MP |
170 | struct page_list *recalc_bitmap; |
171 | struct page_list *may_write_bitmap; | |
172 | struct bitmap_block_status *bbs; | |
173 | unsigned bitmap_flush_interval; | |
48271493 MP |
174 | int synchronous_mode; |
175 | struct bio_list synchronous_bios; | |
468dfca3 | 176 | struct delayed_work bitmap_flush_work; |
7eada909 MP |
177 | |
178 | struct crypto_skcipher *journal_crypt; | |
179 | struct scatterlist **journal_scatterlist; | |
180 | struct scatterlist **journal_io_scatterlist; | |
181 | struct skcipher_request **sk_requests; | |
182 | ||
183 | struct crypto_shash *journal_mac; | |
184 | ||
185 | struct journal_node *journal_tree; | |
186 | struct rb_root journal_tree_root; | |
187 | ||
188 | sector_t provided_data_sectors; | |
189 | ||
190 | unsigned short journal_entry_size; | |
191 | unsigned char journal_entries_per_sector; | |
192 | unsigned char journal_section_entries; | |
9d609f85 | 193 | unsigned short journal_section_sectors; |
7eada909 MP |
194 | unsigned journal_sections; |
195 | unsigned journal_entries; | |
356d9d52 MP |
196 | sector_t data_device_sectors; |
197 | sector_t meta_device_sectors; | |
7eada909 MP |
198 | unsigned initial_sectors; |
199 | unsigned metadata_run; | |
200 | __s8 log2_metadata_run; | |
201 | __u8 log2_buffer_sectors; | |
9d609f85 | 202 | __u8 sectors_per_block; |
468dfca3 | 203 | __u8 log2_blocks_per_bitmap_bit; |
7eada909 MP |
204 | |
205 | unsigned char mode; | |
7eada909 MP |
206 | |
207 | int failed; | |
208 | ||
209 | struct crypto_shash *internal_hash; | |
210 | ||
adc0daad MP |
211 | struct dm_target *ti; |
212 | ||
7eada909 MP |
213 | /* these variables are locked with endio_wait.lock */ |
214 | struct rb_root in_progress; | |
724376a0 | 215 | struct list_head wait_list; |
7eada909 MP |
216 | wait_queue_head_t endio_wait; |
217 | struct workqueue_struct *wait_wq; | |
53770f0e | 218 | struct workqueue_struct *offload_wq; |
7eada909 MP |
219 | |
220 | unsigned char commit_seq; | |
221 | commit_id_t commit_ids[N_COMMIT_IDS]; | |
222 | ||
223 | unsigned committed_section; | |
224 | unsigned n_committed_sections; | |
225 | ||
226 | unsigned uncommitted_section; | |
227 | unsigned n_uncommitted_sections; | |
228 | ||
229 | unsigned free_section; | |
230 | unsigned char free_section_entry; | |
231 | unsigned free_sectors; | |
232 | ||
233 | unsigned free_sectors_threshold; | |
234 | ||
235 | struct workqueue_struct *commit_wq; | |
236 | struct work_struct commit_work; | |
237 | ||
238 | struct workqueue_struct *writer_wq; | |
239 | struct work_struct writer_work; | |
240 | ||
a3fcf725 MP |
241 | struct workqueue_struct *recalc_wq; |
242 | struct work_struct recalc_work; | |
243 | u8 *recalc_buffer; | |
244 | u8 *recalc_tags; | |
245 | ||
7eada909 MP |
246 | struct bio_list flush_bio_list; |
247 | ||
248 | unsigned long autocommit_jiffies; | |
249 | struct timer_list autocommit_timer; | |
250 | unsigned autocommit_msec; | |
251 | ||
252 | wait_queue_head_t copy_to_journal_wait; | |
253 | ||
254 | struct completion crypto_backoff; | |
255 | ||
256 | bool journal_uptodate; | |
257 | bool just_formatted; | |
468dfca3 | 258 | bool recalculate_flag; |
d537858a | 259 | bool fix_padding; |
7eada909 MP |
260 | |
261 | struct alg_spec internal_hash_alg; | |
262 | struct alg_spec journal_crypt_alg; | |
263 | struct alg_spec journal_mac_alg; | |
3f2e5393 MP |
264 | |
265 | atomic64_t number_of_mismatches; | |
1f5a7759 MP |
266 | |
267 | struct notifier_block reboot_notifier; | |
7eada909 MP |
268 | }; |
269 | ||
270 | struct dm_integrity_range { | |
271 | sector_t logical_sector; | |
4f43446d | 272 | sector_t n_sectors; |
724376a0 MP |
273 | bool waiting; |
274 | union { | |
275 | struct rb_node node; | |
276 | struct { | |
277 | struct task_struct *task; | |
278 | struct list_head wait_entry; | |
279 | }; | |
280 | }; | |
7eada909 MP |
281 | }; |
282 | ||
283 | struct dm_integrity_io { | |
284 | struct work_struct work; | |
285 | ||
286 | struct dm_integrity_c *ic; | |
287 | bool write; | |
288 | bool fua; | |
289 | ||
290 | struct dm_integrity_range range; | |
291 | ||
292 | sector_t metadata_block; | |
293 | unsigned metadata_offset; | |
294 | ||
295 | atomic_t in_flight; | |
4e4cbee9 | 296 | blk_status_t bi_status; |
7eada909 MP |
297 | |
298 | struct completion *completion; | |
299 | ||
248aa264 | 300 | struct dm_bio_details bio_details; |
7eada909 MP |
301 | }; |
302 | ||
303 | struct journal_completion { | |
304 | struct dm_integrity_c *ic; | |
305 | atomic_t in_flight; | |
306 | struct completion comp; | |
307 | }; | |
308 | ||
309 | struct journal_io { | |
310 | struct dm_integrity_range range; | |
311 | struct journal_completion *comp; | |
312 | }; | |
313 | ||
468dfca3 MP |
314 | struct bitmap_block_status { |
315 | struct work_struct work; | |
316 | struct dm_integrity_c *ic; | |
317 | unsigned idx; | |
318 | unsigned long *bitmap; | |
319 | struct bio_list bio_queue; | |
320 | spinlock_t bio_queue_lock; | |
321 | ||
322 | }; | |
323 | ||
7eada909 MP |
324 | static struct kmem_cache *journal_io_cache; |
325 | ||
326 | #define JOURNAL_IO_MEMPOOL 32 | |
327 | ||
328 | #ifdef DEBUG_PRINT | |
329 | #define DEBUG_print(x, ...) printk(KERN_DEBUG x, ##__VA_ARGS__) | |
330 | static void __DEBUG_bytes(__u8 *bytes, size_t len, const char *msg, ...) | |
331 | { | |
332 | va_list args; | |
333 | va_start(args, msg); | |
334 | vprintk(msg, args); | |
335 | va_end(args); | |
336 | if (len) | |
337 | pr_cont(":"); | |
338 | while (len) { | |
339 | pr_cont(" %02x", *bytes); | |
340 | bytes++; | |
341 | len--; | |
342 | } | |
343 | pr_cont("\n"); | |
344 | } | |
345 | #define DEBUG_bytes(bytes, len, msg, ...) __DEBUG_bytes(bytes, len, KERN_DEBUG msg, ##__VA_ARGS__) | |
346 | #else | |
347 | #define DEBUG_print(x, ...) do { } while (0) | |
348 | #define DEBUG_bytes(bytes, len, msg, ...) do { } while (0) | |
349 | #endif | |
350 | ||
54d4e6ab MG |
351 | static void dm_integrity_prepare(struct request *rq) |
352 | { | |
353 | } | |
354 | ||
355 | static void dm_integrity_complete(struct request *rq, unsigned int nr_bytes) | |
356 | { | |
357 | } | |
358 | ||
7eada909 MP |
359 | /* |
360 | * DM Integrity profile, protection is performed layer above (dm-crypt) | |
361 | */ | |
7c373d66 | 362 | static const struct blk_integrity_profile dm_integrity_profile = { |
7eada909 MP |
363 | .name = "DM-DIF-EXT-TAG", |
364 | .generate_fn = NULL, | |
365 | .verify_fn = NULL, | |
54d4e6ab MG |
366 | .prepare_fn = dm_integrity_prepare, |
367 | .complete_fn = dm_integrity_complete, | |
7eada909 MP |
368 | }; |
369 | ||
370 | static void dm_integrity_map_continue(struct dm_integrity_io *dio, bool from_map); | |
371 | static void integrity_bio_wait(struct work_struct *w); | |
372 | static void dm_integrity_dtr(struct dm_target *ti); | |
373 | ||
374 | static void dm_integrity_io_error(struct dm_integrity_c *ic, const char *msg, int err) | |
375 | { | |
3f2e5393 MP |
376 | if (err == -EILSEQ) |
377 | atomic64_inc(&ic->number_of_mismatches); | |
7eada909 MP |
378 | if (!cmpxchg(&ic->failed, 0, err)) |
379 | DMERR("Error on %s: %d", msg, err); | |
380 | } | |
381 | ||
382 | static int dm_integrity_failed(struct dm_integrity_c *ic) | |
383 | { | |
d3e632f0 | 384 | return READ_ONCE(ic->failed); |
7eada909 MP |
385 | } |
386 | ||
387 | static commit_id_t dm_integrity_commit_id(struct dm_integrity_c *ic, unsigned i, | |
388 | unsigned j, unsigned char seq) | |
389 | { | |
390 | /* | |
391 | * Xor the number with section and sector, so that if a piece of | |
392 | * journal is written at wrong place, it is detected. | |
393 | */ | |
394 | return ic->commit_ids[seq] ^ cpu_to_le64(((__u64)i << 32) ^ j); | |
395 | } | |
396 | ||
397 | static void get_area_and_offset(struct dm_integrity_c *ic, sector_t data_sector, | |
398 | sector_t *area, sector_t *offset) | |
399 | { | |
356d9d52 MP |
400 | if (!ic->meta_dev) { |
401 | __u8 log2_interleave_sectors = ic->sb->log2_interleave_sectors; | |
402 | *area = data_sector >> log2_interleave_sectors; | |
403 | *offset = (unsigned)data_sector & ((1U << log2_interleave_sectors) - 1); | |
404 | } else { | |
405 | *area = 0; | |
406 | *offset = data_sector; | |
407 | } | |
7eada909 MP |
408 | } |
409 | ||
9d609f85 MP |
410 | #define sector_to_block(ic, n) \ |
411 | do { \ | |
412 | BUG_ON((n) & (unsigned)((ic)->sectors_per_block - 1)); \ | |
413 | (n) >>= (ic)->sb->log2_sectors_per_block; \ | |
414 | } while (0) | |
415 | ||
7eada909 MP |
416 | static __u64 get_metadata_sector_and_offset(struct dm_integrity_c *ic, sector_t area, |
417 | sector_t offset, unsigned *metadata_offset) | |
418 | { | |
419 | __u64 ms; | |
420 | unsigned mo; | |
421 | ||
422 | ms = area << ic->sb->log2_interleave_sectors; | |
423 | if (likely(ic->log2_metadata_run >= 0)) | |
424 | ms += area << ic->log2_metadata_run; | |
425 | else | |
426 | ms += area * ic->metadata_run; | |
427 | ms >>= ic->log2_buffer_sectors; | |
428 | ||
9d609f85 MP |
429 | sector_to_block(ic, offset); |
430 | ||
7eada909 MP |
431 | if (likely(ic->log2_tag_size >= 0)) { |
432 | ms += offset >> (SECTOR_SHIFT + ic->log2_buffer_sectors - ic->log2_tag_size); | |
433 | mo = (offset << ic->log2_tag_size) & ((1U << SECTOR_SHIFT << ic->log2_buffer_sectors) - 1); | |
434 | } else { | |
435 | ms += (__u64)offset * ic->tag_size >> (SECTOR_SHIFT + ic->log2_buffer_sectors); | |
436 | mo = (offset * ic->tag_size) & ((1U << SECTOR_SHIFT << ic->log2_buffer_sectors) - 1); | |
437 | } | |
438 | *metadata_offset = mo; | |
439 | return ms; | |
440 | } | |
441 | ||
442 | static sector_t get_data_sector(struct dm_integrity_c *ic, sector_t area, sector_t offset) | |
443 | { | |
444 | sector_t result; | |
445 | ||
356d9d52 MP |
446 | if (ic->meta_dev) |
447 | return offset; | |
448 | ||
7eada909 MP |
449 | result = area << ic->sb->log2_interleave_sectors; |
450 | if (likely(ic->log2_metadata_run >= 0)) | |
451 | result += (area + 1) << ic->log2_metadata_run; | |
452 | else | |
453 | result += (area + 1) * ic->metadata_run; | |
454 | ||
455 | result += (sector_t)ic->initial_sectors + offset; | |
71e9ddbc MP |
456 | result += ic->start; |
457 | ||
7eada909 MP |
458 | return result; |
459 | } | |
460 | ||
461 | static void wraparound_section(struct dm_integrity_c *ic, unsigned *sec_ptr) | |
462 | { | |
463 | if (unlikely(*sec_ptr >= ic->journal_sections)) | |
464 | *sec_ptr -= ic->journal_sections; | |
465 | } | |
466 | ||
1f9fc0b8 MP |
467 | static void sb_set_version(struct dm_integrity_c *ic) |
468 | { | |
d537858a MP |
469 | if (ic->sb->flags & cpu_to_le32(SB_FLAG_FIXED_PADDING)) |
470 | ic->sb->version = SB_VERSION_4; | |
471 | else if (ic->mode == 'B' || ic->sb->flags & cpu_to_le32(SB_FLAG_DIRTY_BITMAP)) | |
468dfca3 MP |
472 | ic->sb->version = SB_VERSION_3; |
473 | else if (ic->meta_dev || ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) | |
1f9fc0b8 MP |
474 | ic->sb->version = SB_VERSION_2; |
475 | else | |
476 | ic->sb->version = SB_VERSION_1; | |
477 | } | |
478 | ||
7eada909 MP |
479 | static int sync_rw_sb(struct dm_integrity_c *ic, int op, int op_flags) |
480 | { | |
481 | struct dm_io_request io_req; | |
482 | struct dm_io_region io_loc; | |
483 | ||
484 | io_req.bi_op = op; | |
485 | io_req.bi_op_flags = op_flags; | |
486 | io_req.mem.type = DM_IO_KMEM; | |
487 | io_req.mem.ptr.addr = ic->sb; | |
488 | io_req.notify.fn = NULL; | |
489 | io_req.client = ic->io; | |
356d9d52 | 490 | io_loc.bdev = ic->meta_dev ? ic->meta_dev->bdev : ic->dev->bdev; |
7eada909 MP |
491 | io_loc.sector = ic->start; |
492 | io_loc.count = SB_SECTORS; | |
493 | ||
5f1c56b3 MB |
494 | if (op == REQ_OP_WRITE) |
495 | sb_set_version(ic); | |
496 | ||
7eada909 MP |
497 | return dm_io(&io_req, 1, &io_loc, NULL); |
498 | } | |
499 | ||
468dfca3 MP |
500 | #define BITMAP_OP_TEST_ALL_SET 0 |
501 | #define BITMAP_OP_TEST_ALL_CLEAR 1 | |
502 | #define BITMAP_OP_SET 2 | |
503 | #define BITMAP_OP_CLEAR 3 | |
504 | ||
05d6909e MS |
505 | static bool block_bitmap_op(struct dm_integrity_c *ic, struct page_list *bitmap, |
506 | sector_t sector, sector_t n_sectors, int mode) | |
468dfca3 MP |
507 | { |
508 | unsigned long bit, end_bit, this_end_bit, page, end_page; | |
509 | unsigned long *data; | |
510 | ||
511 | if (unlikely(((sector | n_sectors) & ((1 << ic->sb->log2_sectors_per_block) - 1)) != 0)) { | |
05d6909e | 512 | DMCRIT("invalid bitmap access (%llx,%llx,%d,%d,%d)", |
468dfca3 MP |
513 | (unsigned long long)sector, |
514 | (unsigned long long)n_sectors, | |
515 | ic->sb->log2_sectors_per_block, | |
516 | ic->log2_blocks_per_bitmap_bit, | |
517 | mode); | |
518 | BUG(); | |
519 | } | |
520 | ||
521 | if (unlikely(!n_sectors)) | |
522 | return true; | |
523 | ||
524 | bit = sector >> (ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit); | |
05d6909e MS |
525 | end_bit = (sector + n_sectors - 1) >> |
526 | (ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit); | |
468dfca3 MP |
527 | |
528 | page = bit / (PAGE_SIZE * 8); | |
529 | bit %= PAGE_SIZE * 8; | |
530 | ||
531 | end_page = end_bit / (PAGE_SIZE * 8); | |
532 | end_bit %= PAGE_SIZE * 8; | |
533 | ||
534 | repeat: | |
535 | if (page < end_page) { | |
536 | this_end_bit = PAGE_SIZE * 8 - 1; | |
537 | } else { | |
538 | this_end_bit = end_bit; | |
539 | } | |
540 | ||
541 | data = lowmem_page_address(bitmap[page].page); | |
542 | ||
543 | if (mode == BITMAP_OP_TEST_ALL_SET) { | |
544 | while (bit <= this_end_bit) { | |
545 | if (!(bit % BITS_PER_LONG) && this_end_bit >= bit + BITS_PER_LONG - 1) { | |
546 | do { | |
547 | if (data[bit / BITS_PER_LONG] != -1) | |
548 | return false; | |
549 | bit += BITS_PER_LONG; | |
550 | } while (this_end_bit >= bit + BITS_PER_LONG - 1); | |
551 | continue; | |
552 | } | |
553 | if (!test_bit(bit, data)) | |
554 | return false; | |
555 | bit++; | |
556 | } | |
557 | } else if (mode == BITMAP_OP_TEST_ALL_CLEAR) { | |
558 | while (bit <= this_end_bit) { | |
559 | if (!(bit % BITS_PER_LONG) && this_end_bit >= bit + BITS_PER_LONG - 1) { | |
560 | do { | |
561 | if (data[bit / BITS_PER_LONG] != 0) | |
562 | return false; | |
563 | bit += BITS_PER_LONG; | |
564 | } while (this_end_bit >= bit + BITS_PER_LONG - 1); | |
565 | continue; | |
566 | } | |
567 | if (test_bit(bit, data)) | |
568 | return false; | |
569 | bit++; | |
570 | } | |
571 | } else if (mode == BITMAP_OP_SET) { | |
572 | while (bit <= this_end_bit) { | |
573 | if (!(bit % BITS_PER_LONG) && this_end_bit >= bit + BITS_PER_LONG - 1) { | |
574 | do { | |
575 | data[bit / BITS_PER_LONG] = -1; | |
576 | bit += BITS_PER_LONG; | |
577 | } while (this_end_bit >= bit + BITS_PER_LONG - 1); | |
578 | continue; | |
579 | } | |
580 | __set_bit(bit, data); | |
581 | bit++; | |
582 | } | |
583 | } else if (mode == BITMAP_OP_CLEAR) { | |
584 | if (!bit && this_end_bit == PAGE_SIZE * 8 - 1) | |
585 | clear_page(data); | |
586 | else while (bit <= this_end_bit) { | |
587 | if (!(bit % BITS_PER_LONG) && this_end_bit >= bit + BITS_PER_LONG - 1) { | |
588 | do { | |
589 | data[bit / BITS_PER_LONG] = 0; | |
590 | bit += BITS_PER_LONG; | |
591 | } while (this_end_bit >= bit + BITS_PER_LONG - 1); | |
592 | continue; | |
593 | } | |
594 | __clear_bit(bit, data); | |
595 | bit++; | |
596 | } | |
597 | } else { | |
598 | BUG(); | |
599 | } | |
600 | ||
601 | if (unlikely(page < end_page)) { | |
602 | bit = 0; | |
603 | page++; | |
604 | goto repeat; | |
605 | } | |
606 | ||
607 | return true; | |
608 | } | |
609 | ||
610 | static void block_bitmap_copy(struct dm_integrity_c *ic, struct page_list *dst, struct page_list *src) | |
611 | { | |
612 | unsigned n_bitmap_pages = DIV_ROUND_UP(ic->n_bitmap_blocks, PAGE_SIZE / BITMAP_BLOCK_SIZE); | |
613 | unsigned i; | |
614 | ||
615 | for (i = 0; i < n_bitmap_pages; i++) { | |
616 | unsigned long *dst_data = lowmem_page_address(dst[i].page); | |
617 | unsigned long *src_data = lowmem_page_address(src[i].page); | |
618 | copy_page(dst_data, src_data); | |
619 | } | |
620 | } | |
621 | ||
622 | static struct bitmap_block_status *sector_to_bitmap_block(struct dm_integrity_c *ic, sector_t sector) | |
623 | { | |
624 | unsigned bit = sector >> (ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit); | |
625 | unsigned bitmap_block = bit / (BITMAP_BLOCK_SIZE * 8); | |
626 | ||
627 | BUG_ON(bitmap_block >= ic->n_bitmap_blocks); | |
628 | return &ic->bbs[bitmap_block]; | |
629 | } | |
630 | ||
7eada909 MP |
631 | static void access_journal_check(struct dm_integrity_c *ic, unsigned section, unsigned offset, |
632 | bool e, const char *function) | |
633 | { | |
634 | #if defined(CONFIG_DM_DEBUG) || defined(INTERNAL_VERIFY) | |
635 | unsigned limit = e ? ic->journal_section_entries : ic->journal_section_sectors; | |
636 | ||
637 | if (unlikely(section >= ic->journal_sections) || | |
638 | unlikely(offset >= limit)) { | |
05d6909e MS |
639 | DMCRIT("%s: invalid access at (%u,%u), limit (%u,%u)", |
640 | function, section, offset, ic->journal_sections, limit); | |
7eada909 MP |
641 | BUG(); |
642 | } | |
643 | #endif | |
644 | } | |
645 | ||
646 | static void page_list_location(struct dm_integrity_c *ic, unsigned section, unsigned offset, | |
647 | unsigned *pl_index, unsigned *pl_offset) | |
648 | { | |
649 | unsigned sector; | |
650 | ||
56b67a4f | 651 | access_journal_check(ic, section, offset, false, "page_list_location"); |
7eada909 MP |
652 | |
653 | sector = section * ic->journal_section_sectors + offset; | |
654 | ||
655 | *pl_index = sector >> (PAGE_SHIFT - SECTOR_SHIFT); | |
656 | *pl_offset = (sector << SECTOR_SHIFT) & (PAGE_SIZE - 1); | |
657 | } | |
658 | ||
659 | static struct journal_sector *access_page_list(struct dm_integrity_c *ic, struct page_list *pl, | |
660 | unsigned section, unsigned offset, unsigned *n_sectors) | |
661 | { | |
662 | unsigned pl_index, pl_offset; | |
663 | char *va; | |
664 | ||
665 | page_list_location(ic, section, offset, &pl_index, &pl_offset); | |
666 | ||
667 | if (n_sectors) | |
668 | *n_sectors = (PAGE_SIZE - pl_offset) >> SECTOR_SHIFT; | |
669 | ||
670 | va = lowmem_page_address(pl[pl_index].page); | |
671 | ||
672 | return (struct journal_sector *)(va + pl_offset); | |
673 | } | |
674 | ||
675 | static struct journal_sector *access_journal(struct dm_integrity_c *ic, unsigned section, unsigned offset) | |
676 | { | |
677 | return access_page_list(ic, ic->journal, section, offset, NULL); | |
678 | } | |
679 | ||
680 | static struct journal_entry *access_journal_entry(struct dm_integrity_c *ic, unsigned section, unsigned n) | |
681 | { | |
682 | unsigned rel_sector, offset; | |
683 | struct journal_sector *js; | |
684 | ||
685 | access_journal_check(ic, section, n, true, "access_journal_entry"); | |
686 | ||
687 | rel_sector = n % JOURNAL_BLOCK_SECTORS; | |
688 | offset = n / JOURNAL_BLOCK_SECTORS; | |
689 | ||
690 | js = access_journal(ic, section, rel_sector); | |
691 | return (struct journal_entry *)((char *)js + offset * ic->journal_entry_size); | |
692 | } | |
693 | ||
694 | static struct journal_sector *access_journal_data(struct dm_integrity_c *ic, unsigned section, unsigned n) | |
695 | { | |
9d609f85 | 696 | n <<= ic->sb->log2_sectors_per_block; |
7eada909 | 697 | |
9d609f85 MP |
698 | n += JOURNAL_BLOCK_SECTORS; |
699 | ||
700 | access_journal_check(ic, section, n, false, "access_journal_data"); | |
701 | ||
702 | return access_journal(ic, section, n); | |
7eada909 MP |
703 | } |
704 | ||
705 | static void section_mac(struct dm_integrity_c *ic, unsigned section, __u8 result[JOURNAL_MAC_SIZE]) | |
706 | { | |
707 | SHASH_DESC_ON_STACK(desc, ic->journal_mac); | |
708 | int r; | |
709 | unsigned j, size; | |
710 | ||
711 | desc->tfm = ic->journal_mac; | |
7eada909 MP |
712 | |
713 | r = crypto_shash_init(desc); | |
714 | if (unlikely(r)) { | |
715 | dm_integrity_io_error(ic, "crypto_shash_init", r); | |
716 | goto err; | |
717 | } | |
718 | ||
719 | for (j = 0; j < ic->journal_section_entries; j++) { | |
720 | struct journal_entry *je = access_journal_entry(ic, section, j); | |
721 | r = crypto_shash_update(desc, (__u8 *)&je->u.sector, sizeof je->u.sector); | |
722 | if (unlikely(r)) { | |
723 | dm_integrity_io_error(ic, "crypto_shash_update", r); | |
724 | goto err; | |
725 | } | |
726 | } | |
727 | ||
728 | size = crypto_shash_digestsize(ic->journal_mac); | |
729 | ||
730 | if (likely(size <= JOURNAL_MAC_SIZE)) { | |
731 | r = crypto_shash_final(desc, result); | |
732 | if (unlikely(r)) { | |
733 | dm_integrity_io_error(ic, "crypto_shash_final", r); | |
734 | goto err; | |
735 | } | |
736 | memset(result + size, 0, JOURNAL_MAC_SIZE - size); | |
737 | } else { | |
6d39a124 KC |
738 | __u8 digest[HASH_MAX_DIGESTSIZE]; |
739 | ||
740 | if (WARN_ON(size > sizeof(digest))) { | |
741 | dm_integrity_io_error(ic, "digest_size", -EINVAL); | |
742 | goto err; | |
743 | } | |
7eada909 MP |
744 | r = crypto_shash_final(desc, digest); |
745 | if (unlikely(r)) { | |
746 | dm_integrity_io_error(ic, "crypto_shash_final", r); | |
747 | goto err; | |
748 | } | |
749 | memcpy(result, digest, JOURNAL_MAC_SIZE); | |
750 | } | |
751 | ||
752 | return; | |
753 | err: | |
754 | memset(result, 0, JOURNAL_MAC_SIZE); | |
755 | } | |
756 | ||
757 | static void rw_section_mac(struct dm_integrity_c *ic, unsigned section, bool wr) | |
758 | { | |
759 | __u8 result[JOURNAL_MAC_SIZE]; | |
760 | unsigned j; | |
761 | ||
762 | if (!ic->journal_mac) | |
763 | return; | |
764 | ||
765 | section_mac(ic, section, result); | |
766 | ||
767 | for (j = 0; j < JOURNAL_BLOCK_SECTORS; j++) { | |
768 | struct journal_sector *js = access_journal(ic, section, j); | |
769 | ||
770 | if (likely(wr)) | |
771 | memcpy(&js->mac, result + (j * JOURNAL_MAC_PER_SECTOR), JOURNAL_MAC_PER_SECTOR); | |
772 | else { | |
773 | if (memcmp(&js->mac, result + (j * JOURNAL_MAC_PER_SECTOR), JOURNAL_MAC_PER_SECTOR)) | |
774 | dm_integrity_io_error(ic, "journal mac", -EILSEQ); | |
775 | } | |
776 | } | |
777 | } | |
778 | ||
779 | static void complete_journal_op(void *context) | |
780 | { | |
781 | struct journal_completion *comp = context; | |
782 | BUG_ON(!atomic_read(&comp->in_flight)); | |
783 | if (likely(atomic_dec_and_test(&comp->in_flight))) | |
784 | complete(&comp->comp); | |
785 | } | |
786 | ||
787 | static void xor_journal(struct dm_integrity_c *ic, bool encrypt, unsigned section, | |
788 | unsigned n_sections, struct journal_completion *comp) | |
789 | { | |
790 | struct async_submit_ctl submit; | |
791 | size_t n_bytes = (size_t)(n_sections * ic->journal_section_sectors) << SECTOR_SHIFT; | |
792 | unsigned pl_index, pl_offset, section_index; | |
793 | struct page_list *source_pl, *target_pl; | |
794 | ||
795 | if (likely(encrypt)) { | |
796 | source_pl = ic->journal; | |
797 | target_pl = ic->journal_io; | |
798 | } else { | |
799 | source_pl = ic->journal_io; | |
800 | target_pl = ic->journal; | |
801 | } | |
802 | ||
803 | page_list_location(ic, section, 0, &pl_index, &pl_offset); | |
804 | ||
805 | atomic_add(roundup(pl_offset + n_bytes, PAGE_SIZE) >> PAGE_SHIFT, &comp->in_flight); | |
806 | ||
807 | init_async_submit(&submit, ASYNC_TX_XOR_ZERO_DST, NULL, complete_journal_op, comp, NULL); | |
808 | ||
809 | section_index = pl_index; | |
810 | ||
811 | do { | |
812 | size_t this_step; | |
813 | struct page *src_pages[2]; | |
814 | struct page *dst_page; | |
815 | ||
816 | while (unlikely(pl_index == section_index)) { | |
817 | unsigned dummy; | |
818 | if (likely(encrypt)) | |
819 | rw_section_mac(ic, section, true); | |
820 | section++; | |
821 | n_sections--; | |
822 | if (!n_sections) | |
823 | break; | |
824 | page_list_location(ic, section, 0, §ion_index, &dummy); | |
825 | } | |
826 | ||
827 | this_step = min(n_bytes, (size_t)PAGE_SIZE - pl_offset); | |
828 | dst_page = target_pl[pl_index].page; | |
829 | src_pages[0] = source_pl[pl_index].page; | |
830 | src_pages[1] = ic->journal_xor[pl_index].page; | |
831 | ||
832 | async_xor(dst_page, src_pages, pl_offset, 2, this_step, &submit); | |
833 | ||
834 | pl_index++; | |
835 | pl_offset = 0; | |
836 | n_bytes -= this_step; | |
837 | } while (n_bytes); | |
838 | ||
839 | BUG_ON(n_sections); | |
840 | ||
841 | async_tx_issue_pending_all(); | |
842 | } | |
843 | ||
844 | static void complete_journal_encrypt(struct crypto_async_request *req, int err) | |
845 | { | |
846 | struct journal_completion *comp = req->data; | |
847 | if (unlikely(err)) { | |
848 | if (likely(err == -EINPROGRESS)) { | |
849 | complete(&comp->ic->crypto_backoff); | |
850 | return; | |
851 | } | |
852 | dm_integrity_io_error(comp->ic, "asynchronous encrypt", err); | |
853 | } | |
854 | complete_journal_op(comp); | |
855 | } | |
856 | ||
857 | static bool do_crypt(bool encrypt, struct skcipher_request *req, struct journal_completion *comp) | |
858 | { | |
859 | int r; | |
432061b3 | 860 | skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, |
7eada909 MP |
861 | complete_journal_encrypt, comp); |
862 | if (likely(encrypt)) | |
863 | r = crypto_skcipher_encrypt(req); | |
864 | else | |
865 | r = crypto_skcipher_decrypt(req); | |
866 | if (likely(!r)) | |
867 | return false; | |
868 | if (likely(r == -EINPROGRESS)) | |
869 | return true; | |
870 | if (likely(r == -EBUSY)) { | |
871 | wait_for_completion(&comp->ic->crypto_backoff); | |
872 | reinit_completion(&comp->ic->crypto_backoff); | |
873 | return true; | |
874 | } | |
875 | dm_integrity_io_error(comp->ic, "encrypt", r); | |
876 | return false; | |
877 | } | |
878 | ||
879 | static void crypt_journal(struct dm_integrity_c *ic, bool encrypt, unsigned section, | |
880 | unsigned n_sections, struct journal_completion *comp) | |
881 | { | |
882 | struct scatterlist **source_sg; | |
883 | struct scatterlist **target_sg; | |
884 | ||
885 | atomic_add(2, &comp->in_flight); | |
886 | ||
887 | if (likely(encrypt)) { | |
888 | source_sg = ic->journal_scatterlist; | |
889 | target_sg = ic->journal_io_scatterlist; | |
890 | } else { | |
891 | source_sg = ic->journal_io_scatterlist; | |
892 | target_sg = ic->journal_scatterlist; | |
893 | } | |
894 | ||
895 | do { | |
896 | struct skcipher_request *req; | |
897 | unsigned ivsize; | |
898 | char *iv; | |
899 | ||
900 | if (likely(encrypt)) | |
901 | rw_section_mac(ic, section, true); | |
902 | ||
903 | req = ic->sk_requests[section]; | |
904 | ivsize = crypto_skcipher_ivsize(ic->journal_crypt); | |
905 | iv = req->iv; | |
906 | ||
907 | memcpy(iv, iv + ivsize, ivsize); | |
908 | ||
909 | req->src = source_sg[section]; | |
910 | req->dst = target_sg[section]; | |
911 | ||
912 | if (unlikely(do_crypt(encrypt, req, comp))) | |
913 | atomic_inc(&comp->in_flight); | |
914 | ||
915 | section++; | |
916 | n_sections--; | |
917 | } while (n_sections); | |
918 | ||
919 | atomic_dec(&comp->in_flight); | |
920 | complete_journal_op(comp); | |
921 | } | |
922 | ||
923 | static void encrypt_journal(struct dm_integrity_c *ic, bool encrypt, unsigned section, | |
924 | unsigned n_sections, struct journal_completion *comp) | |
925 | { | |
926 | if (ic->journal_xor) | |
927 | return xor_journal(ic, encrypt, section, n_sections, comp); | |
928 | else | |
929 | return crypt_journal(ic, encrypt, section, n_sections, comp); | |
930 | } | |
931 | ||
932 | static void complete_journal_io(unsigned long error, void *context) | |
933 | { | |
934 | struct journal_completion *comp = context; | |
935 | if (unlikely(error != 0)) | |
936 | dm_integrity_io_error(comp->ic, "writing journal", -EIO); | |
937 | complete_journal_op(comp); | |
938 | } | |
939 | ||
981e8a98 MP |
940 | static void rw_journal_sectors(struct dm_integrity_c *ic, int op, int op_flags, |
941 | unsigned sector, unsigned n_sectors, struct journal_completion *comp) | |
7eada909 MP |
942 | { |
943 | struct dm_io_request io_req; | |
944 | struct dm_io_region io_loc; | |
981e8a98 | 945 | unsigned pl_index, pl_offset; |
7eada909 MP |
946 | int r; |
947 | ||
948 | if (unlikely(dm_integrity_failed(ic))) { | |
949 | if (comp) | |
950 | complete_journal_io(-1UL, comp); | |
951 | return; | |
952 | } | |
953 | ||
7eada909 MP |
954 | pl_index = sector >> (PAGE_SHIFT - SECTOR_SHIFT); |
955 | pl_offset = (sector << SECTOR_SHIFT) & (PAGE_SIZE - 1); | |
956 | ||
957 | io_req.bi_op = op; | |
958 | io_req.bi_op_flags = op_flags; | |
959 | io_req.mem.type = DM_IO_PAGE_LIST; | |
960 | if (ic->journal_io) | |
961 | io_req.mem.ptr.pl = &ic->journal_io[pl_index]; | |
962 | else | |
963 | io_req.mem.ptr.pl = &ic->journal[pl_index]; | |
964 | io_req.mem.offset = pl_offset; | |
965 | if (likely(comp != NULL)) { | |
966 | io_req.notify.fn = complete_journal_io; | |
967 | io_req.notify.context = comp; | |
968 | } else { | |
969 | io_req.notify.fn = NULL; | |
970 | } | |
971 | io_req.client = ic->io; | |
356d9d52 | 972 | io_loc.bdev = ic->meta_dev ? ic->meta_dev->bdev : ic->dev->bdev; |
7eada909 MP |
973 | io_loc.sector = ic->start + SB_SECTORS + sector; |
974 | io_loc.count = n_sectors; | |
975 | ||
976 | r = dm_io(&io_req, 1, &io_loc, NULL); | |
977 | if (unlikely(r)) { | |
978 | dm_integrity_io_error(ic, op == REQ_OP_READ ? "reading journal" : "writing journal", r); | |
979 | if (comp) { | |
980 | WARN_ONCE(1, "asynchronous dm_io failed: %d", r); | |
981 | complete_journal_io(-1UL, comp); | |
982 | } | |
983 | } | |
984 | } | |
985 | ||
981e8a98 MP |
986 | static void rw_journal(struct dm_integrity_c *ic, int op, int op_flags, unsigned section, |
987 | unsigned n_sections, struct journal_completion *comp) | |
988 | { | |
989 | unsigned sector, n_sectors; | |
990 | ||
991 | sector = section * ic->journal_section_sectors; | |
992 | n_sectors = n_sections * ic->journal_section_sectors; | |
993 | ||
994 | rw_journal_sectors(ic, op, op_flags, sector, n_sectors, comp); | |
995 | } | |
996 | ||
7eada909 MP |
997 | static void write_journal(struct dm_integrity_c *ic, unsigned commit_start, unsigned commit_sections) |
998 | { | |
999 | struct journal_completion io_comp; | |
1000 | struct journal_completion crypt_comp_1; | |
1001 | struct journal_completion crypt_comp_2; | |
1002 | unsigned i; | |
1003 | ||
1004 | io_comp.ic = ic; | |
b5e8ad92 | 1005 | init_completion(&io_comp.comp); |
7eada909 MP |
1006 | |
1007 | if (commit_start + commit_sections <= ic->journal_sections) { | |
1008 | io_comp.in_flight = (atomic_t)ATOMIC_INIT(1); | |
1009 | if (ic->journal_io) { | |
1010 | crypt_comp_1.ic = ic; | |
b5e8ad92 | 1011 | init_completion(&crypt_comp_1.comp); |
7eada909 MP |
1012 | crypt_comp_1.in_flight = (atomic_t)ATOMIC_INIT(0); |
1013 | encrypt_journal(ic, true, commit_start, commit_sections, &crypt_comp_1); | |
1014 | wait_for_completion_io(&crypt_comp_1.comp); | |
1015 | } else { | |
1016 | for (i = 0; i < commit_sections; i++) | |
1017 | rw_section_mac(ic, commit_start + i, true); | |
1018 | } | |
ff0361b3 JK |
1019 | rw_journal(ic, REQ_OP_WRITE, REQ_FUA | REQ_SYNC, commit_start, |
1020 | commit_sections, &io_comp); | |
7eada909 MP |
1021 | } else { |
1022 | unsigned to_end; | |
1023 | io_comp.in_flight = (atomic_t)ATOMIC_INIT(2); | |
1024 | to_end = ic->journal_sections - commit_start; | |
1025 | if (ic->journal_io) { | |
1026 | crypt_comp_1.ic = ic; | |
b5e8ad92 | 1027 | init_completion(&crypt_comp_1.comp); |
7eada909 MP |
1028 | crypt_comp_1.in_flight = (atomic_t)ATOMIC_INIT(0); |
1029 | encrypt_journal(ic, true, commit_start, to_end, &crypt_comp_1); | |
1030 | if (try_wait_for_completion(&crypt_comp_1.comp)) { | |
1031 | rw_journal(ic, REQ_OP_WRITE, REQ_FUA, commit_start, to_end, &io_comp); | |
b5e8ad92 | 1032 | reinit_completion(&crypt_comp_1.comp); |
7eada909 MP |
1033 | crypt_comp_1.in_flight = (atomic_t)ATOMIC_INIT(0); |
1034 | encrypt_journal(ic, true, 0, commit_sections - to_end, &crypt_comp_1); | |
1035 | wait_for_completion_io(&crypt_comp_1.comp); | |
1036 | } else { | |
1037 | crypt_comp_2.ic = ic; | |
b5e8ad92 | 1038 | init_completion(&crypt_comp_2.comp); |
7eada909 MP |
1039 | crypt_comp_2.in_flight = (atomic_t)ATOMIC_INIT(0); |
1040 | encrypt_journal(ic, true, 0, commit_sections - to_end, &crypt_comp_2); | |
1041 | wait_for_completion_io(&crypt_comp_1.comp); | |
1042 | rw_journal(ic, REQ_OP_WRITE, REQ_FUA, commit_start, to_end, &io_comp); | |
1043 | wait_for_completion_io(&crypt_comp_2.comp); | |
1044 | } | |
1045 | } else { | |
1046 | for (i = 0; i < to_end; i++) | |
1047 | rw_section_mac(ic, commit_start + i, true); | |
1048 | rw_journal(ic, REQ_OP_WRITE, REQ_FUA, commit_start, to_end, &io_comp); | |
1049 | for (i = 0; i < commit_sections - to_end; i++) | |
1050 | rw_section_mac(ic, i, true); | |
1051 | } | |
1052 | rw_journal(ic, REQ_OP_WRITE, REQ_FUA, 0, commit_sections - to_end, &io_comp); | |
1053 | } | |
1054 | ||
1055 | wait_for_completion_io(&io_comp.comp); | |
1056 | } | |
1057 | ||
1058 | static void copy_from_journal(struct dm_integrity_c *ic, unsigned section, unsigned offset, | |
1059 | unsigned n_sectors, sector_t target, io_notify_fn fn, void *data) | |
1060 | { | |
1061 | struct dm_io_request io_req; | |
1062 | struct dm_io_region io_loc; | |
1063 | int r; | |
1064 | unsigned sector, pl_index, pl_offset; | |
1065 | ||
9d609f85 MP |
1066 | BUG_ON((target | n_sectors | offset) & (unsigned)(ic->sectors_per_block - 1)); |
1067 | ||
7eada909 MP |
1068 | if (unlikely(dm_integrity_failed(ic))) { |
1069 | fn(-1UL, data); | |
1070 | return; | |
1071 | } | |
1072 | ||
1073 | sector = section * ic->journal_section_sectors + JOURNAL_BLOCK_SECTORS + offset; | |
1074 | ||
1075 | pl_index = sector >> (PAGE_SHIFT - SECTOR_SHIFT); | |
1076 | pl_offset = (sector << SECTOR_SHIFT) & (PAGE_SIZE - 1); | |
1077 | ||
1078 | io_req.bi_op = REQ_OP_WRITE; | |
1079 | io_req.bi_op_flags = 0; | |
1080 | io_req.mem.type = DM_IO_PAGE_LIST; | |
1081 | io_req.mem.ptr.pl = &ic->journal[pl_index]; | |
1082 | io_req.mem.offset = pl_offset; | |
1083 | io_req.notify.fn = fn; | |
1084 | io_req.notify.context = data; | |
1085 | io_req.client = ic->io; | |
1086 | io_loc.bdev = ic->dev->bdev; | |
71e9ddbc | 1087 | io_loc.sector = target; |
7eada909 MP |
1088 | io_loc.count = n_sectors; |
1089 | ||
1090 | r = dm_io(&io_req, 1, &io_loc, NULL); | |
1091 | if (unlikely(r)) { | |
1092 | WARN_ONCE(1, "asynchronous dm_io failed: %d", r); | |
1093 | fn(-1UL, data); | |
1094 | } | |
1095 | } | |
1096 | ||
724376a0 MP |
1097 | static bool ranges_overlap(struct dm_integrity_range *range1, struct dm_integrity_range *range2) |
1098 | { | |
1099 | return range1->logical_sector < range2->logical_sector + range2->n_sectors && | |
4ed319c6 | 1100 | range1->logical_sector + range1->n_sectors > range2->logical_sector; |
724376a0 MP |
1101 | } |
1102 | ||
1103 | static bool add_new_range(struct dm_integrity_c *ic, struct dm_integrity_range *new_range, bool check_waiting) | |
7eada909 MP |
1104 | { |
1105 | struct rb_node **n = &ic->in_progress.rb_node; | |
1106 | struct rb_node *parent; | |
1107 | ||
9d609f85 MP |
1108 | BUG_ON((new_range->logical_sector | new_range->n_sectors) & (unsigned)(ic->sectors_per_block - 1)); |
1109 | ||
724376a0 MP |
1110 | if (likely(check_waiting)) { |
1111 | struct dm_integrity_range *range; | |
1112 | list_for_each_entry(range, &ic->wait_list, wait_entry) { | |
1113 | if (unlikely(ranges_overlap(range, new_range))) | |
1114 | return false; | |
1115 | } | |
1116 | } | |
1117 | ||
7eada909 MP |
1118 | parent = NULL; |
1119 | ||
1120 | while (*n) { | |
1121 | struct dm_integrity_range *range = container_of(*n, struct dm_integrity_range, node); | |
1122 | ||
1123 | parent = *n; | |
1124 | if (new_range->logical_sector + new_range->n_sectors <= range->logical_sector) { | |
1125 | n = &range->node.rb_left; | |
1126 | } else if (new_range->logical_sector >= range->logical_sector + range->n_sectors) { | |
1127 | n = &range->node.rb_right; | |
1128 | } else { | |
1129 | return false; | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | rb_link_node(&new_range->node, parent, n); | |
1134 | rb_insert_color(&new_range->node, &ic->in_progress); | |
1135 | ||
1136 | return true; | |
1137 | } | |
1138 | ||
1139 | static void remove_range_unlocked(struct dm_integrity_c *ic, struct dm_integrity_range *range) | |
1140 | { | |
1141 | rb_erase(&range->node, &ic->in_progress); | |
724376a0 MP |
1142 | while (unlikely(!list_empty(&ic->wait_list))) { |
1143 | struct dm_integrity_range *last_range = | |
1144 | list_first_entry(&ic->wait_list, struct dm_integrity_range, wait_entry); | |
1145 | struct task_struct *last_range_task; | |
724376a0 MP |
1146 | last_range_task = last_range->task; |
1147 | list_del(&last_range->wait_entry); | |
1148 | if (!add_new_range(ic, last_range, false)) { | |
1149 | last_range->task = last_range_task; | |
1150 | list_add(&last_range->wait_entry, &ic->wait_list); | |
1151 | break; | |
1152 | } | |
1153 | last_range->waiting = false; | |
1154 | wake_up_process(last_range_task); | |
1155 | } | |
7eada909 MP |
1156 | } |
1157 | ||
1158 | static void remove_range(struct dm_integrity_c *ic, struct dm_integrity_range *range) | |
1159 | { | |
1160 | unsigned long flags; | |
1161 | ||
1162 | spin_lock_irqsave(&ic->endio_wait.lock, flags); | |
1163 | remove_range_unlocked(ic, range); | |
1164 | spin_unlock_irqrestore(&ic->endio_wait.lock, flags); | |
1165 | } | |
1166 | ||
724376a0 MP |
1167 | static void wait_and_add_new_range(struct dm_integrity_c *ic, struct dm_integrity_range *new_range) |
1168 | { | |
1169 | new_range->waiting = true; | |
1170 | list_add_tail(&new_range->wait_entry, &ic->wait_list); | |
1171 | new_range->task = current; | |
1172 | do { | |
1173 | __set_current_state(TASK_UNINTERRUPTIBLE); | |
1174 | spin_unlock_irq(&ic->endio_wait.lock); | |
1175 | io_schedule(); | |
1176 | spin_lock_irq(&ic->endio_wait.lock); | |
1177 | } while (unlikely(new_range->waiting)); | |
1178 | } | |
1179 | ||
8b3bbd49 MP |
1180 | static void add_new_range_and_wait(struct dm_integrity_c *ic, struct dm_integrity_range *new_range) |
1181 | { | |
1182 | if (unlikely(!add_new_range(ic, new_range, true))) | |
1183 | wait_and_add_new_range(ic, new_range); | |
1184 | } | |
1185 | ||
7eada909 MP |
1186 | static void init_journal_node(struct journal_node *node) |
1187 | { | |
1188 | RB_CLEAR_NODE(&node->node); | |
1189 | node->sector = (sector_t)-1; | |
1190 | } | |
1191 | ||
1192 | static void add_journal_node(struct dm_integrity_c *ic, struct journal_node *node, sector_t sector) | |
1193 | { | |
1194 | struct rb_node **link; | |
1195 | struct rb_node *parent; | |
1196 | ||
1197 | node->sector = sector; | |
1198 | BUG_ON(!RB_EMPTY_NODE(&node->node)); | |
1199 | ||
1200 | link = &ic->journal_tree_root.rb_node; | |
1201 | parent = NULL; | |
1202 | ||
1203 | while (*link) { | |
1204 | struct journal_node *j; | |
1205 | parent = *link; | |
1206 | j = container_of(parent, struct journal_node, node); | |
1207 | if (sector < j->sector) | |
1208 | link = &j->node.rb_left; | |
1209 | else | |
1210 | link = &j->node.rb_right; | |
1211 | } | |
1212 | ||
1213 | rb_link_node(&node->node, parent, link); | |
1214 | rb_insert_color(&node->node, &ic->journal_tree_root); | |
1215 | } | |
1216 | ||
1217 | static void remove_journal_node(struct dm_integrity_c *ic, struct journal_node *node) | |
1218 | { | |
1219 | BUG_ON(RB_EMPTY_NODE(&node->node)); | |
1220 | rb_erase(&node->node, &ic->journal_tree_root); | |
1221 | init_journal_node(node); | |
1222 | } | |
1223 | ||
1224 | #define NOT_FOUND (-1U) | |
1225 | ||
1226 | static unsigned find_journal_node(struct dm_integrity_c *ic, sector_t sector, sector_t *next_sector) | |
1227 | { | |
1228 | struct rb_node *n = ic->journal_tree_root.rb_node; | |
1229 | unsigned found = NOT_FOUND; | |
1230 | *next_sector = (sector_t)-1; | |
1231 | while (n) { | |
1232 | struct journal_node *j = container_of(n, struct journal_node, node); | |
1233 | if (sector == j->sector) { | |
1234 | found = j - ic->journal_tree; | |
1235 | } | |
1236 | if (sector < j->sector) { | |
1237 | *next_sector = j->sector; | |
1238 | n = j->node.rb_left; | |
1239 | } else { | |
1240 | n = j->node.rb_right; | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | return found; | |
1245 | } | |
1246 | ||
1247 | static bool test_journal_node(struct dm_integrity_c *ic, unsigned pos, sector_t sector) | |
1248 | { | |
1249 | struct journal_node *node, *next_node; | |
1250 | struct rb_node *next; | |
1251 | ||
1252 | if (unlikely(pos >= ic->journal_entries)) | |
1253 | return false; | |
1254 | node = &ic->journal_tree[pos]; | |
1255 | if (unlikely(RB_EMPTY_NODE(&node->node))) | |
1256 | return false; | |
1257 | if (unlikely(node->sector != sector)) | |
1258 | return false; | |
1259 | ||
1260 | next = rb_next(&node->node); | |
1261 | if (unlikely(!next)) | |
1262 | return true; | |
1263 | ||
1264 | next_node = container_of(next, struct journal_node, node); | |
1265 | return next_node->sector != sector; | |
1266 | } | |
1267 | ||
1268 | static bool find_newer_committed_node(struct dm_integrity_c *ic, struct journal_node *node) | |
1269 | { | |
1270 | struct rb_node *next; | |
1271 | struct journal_node *next_node; | |
1272 | unsigned next_section; | |
1273 | ||
1274 | BUG_ON(RB_EMPTY_NODE(&node->node)); | |
1275 | ||
1276 | next = rb_next(&node->node); | |
1277 | if (unlikely(!next)) | |
1278 | return false; | |
1279 | ||
1280 | next_node = container_of(next, struct journal_node, node); | |
1281 | ||
1282 | if (next_node->sector != node->sector) | |
1283 | return false; | |
1284 | ||
1285 | next_section = (unsigned)(next_node - ic->journal_tree) / ic->journal_section_entries; | |
1286 | if (next_section >= ic->committed_section && | |
1287 | next_section < ic->committed_section + ic->n_committed_sections) | |
1288 | return true; | |
1289 | if (next_section + ic->journal_sections < ic->committed_section + ic->n_committed_sections) | |
1290 | return true; | |
1291 | ||
1292 | return false; | |
1293 | } | |
1294 | ||
1295 | #define TAG_READ 0 | |
1296 | #define TAG_WRITE 1 | |
1297 | #define TAG_CMP 2 | |
1298 | ||
1299 | static int dm_integrity_rw_tag(struct dm_integrity_c *ic, unsigned char *tag, sector_t *metadata_block, | |
1300 | unsigned *metadata_offset, unsigned total_size, int op) | |
1301 | { | |
1302 | do { | |
1303 | unsigned char *data, *dp; | |
1304 | struct dm_buffer *b; | |
1305 | unsigned to_copy; | |
1306 | int r; | |
1307 | ||
1308 | r = dm_integrity_failed(ic); | |
1309 | if (unlikely(r)) | |
1310 | return r; | |
1311 | ||
1312 | data = dm_bufio_read(ic->bufio, *metadata_block, &b); | |
5e3d0e37 | 1313 | if (IS_ERR(data)) |
7eada909 MP |
1314 | return PTR_ERR(data); |
1315 | ||
1316 | to_copy = min((1U << SECTOR_SHIFT << ic->log2_buffer_sectors) - *metadata_offset, total_size); | |
1317 | dp = data + *metadata_offset; | |
1318 | if (op == TAG_READ) { | |
1319 | memcpy(tag, dp, to_copy); | |
1320 | } else if (op == TAG_WRITE) { | |
1321 | memcpy(dp, tag, to_copy); | |
1e3b21c6 | 1322 | dm_bufio_mark_partial_buffer_dirty(b, *metadata_offset, *metadata_offset + to_copy); |
7eada909 MP |
1323 | } else { |
1324 | /* e.g.: op == TAG_CMP */ | |
1325 | if (unlikely(memcmp(dp, tag, to_copy))) { | |
1326 | unsigned i; | |
1327 | ||
1328 | for (i = 0; i < to_copy; i++) { | |
1329 | if (dp[i] != tag[i]) | |
1330 | break; | |
1331 | total_size--; | |
1332 | } | |
1333 | dm_bufio_release(b); | |
1334 | return total_size; | |
1335 | } | |
1336 | } | |
1337 | dm_bufio_release(b); | |
1338 | ||
1339 | tag += to_copy; | |
1340 | *metadata_offset += to_copy; | |
1341 | if (unlikely(*metadata_offset == 1U << SECTOR_SHIFT << ic->log2_buffer_sectors)) { | |
1342 | (*metadata_block)++; | |
1343 | *metadata_offset = 0; | |
1344 | } | |
1345 | total_size -= to_copy; | |
1346 | } while (unlikely(total_size)); | |
1347 | ||
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | static void dm_integrity_flush_buffers(struct dm_integrity_c *ic) | |
1352 | { | |
1353 | int r; | |
1354 | r = dm_bufio_write_dirty_buffers(ic->bufio); | |
1355 | if (unlikely(r)) | |
1356 | dm_integrity_io_error(ic, "writing tags", r); | |
1357 | } | |
1358 | ||
1359 | static void sleep_on_endio_wait(struct dm_integrity_c *ic) | |
1360 | { | |
1361 | DECLARE_WAITQUEUE(wait, current); | |
1362 | __add_wait_queue(&ic->endio_wait, &wait); | |
1363 | __set_current_state(TASK_UNINTERRUPTIBLE); | |
1364 | spin_unlock_irq(&ic->endio_wait.lock); | |
1365 | io_schedule(); | |
1366 | spin_lock_irq(&ic->endio_wait.lock); | |
1367 | __remove_wait_queue(&ic->endio_wait, &wait); | |
1368 | } | |
1369 | ||
8376d3c1 | 1370 | static void autocommit_fn(struct timer_list *t) |
7eada909 | 1371 | { |
8376d3c1 | 1372 | struct dm_integrity_c *ic = from_timer(ic, t, autocommit_timer); |
7eada909 MP |
1373 | |
1374 | if (likely(!dm_integrity_failed(ic))) | |
1375 | queue_work(ic->commit_wq, &ic->commit_work); | |
1376 | } | |
1377 | ||
1378 | static void schedule_autocommit(struct dm_integrity_c *ic) | |
1379 | { | |
1380 | if (!timer_pending(&ic->autocommit_timer)) | |
1381 | mod_timer(&ic->autocommit_timer, jiffies + ic->autocommit_jiffies); | |
1382 | } | |
1383 | ||
1384 | static void submit_flush_bio(struct dm_integrity_c *ic, struct dm_integrity_io *dio) | |
1385 | { | |
1386 | struct bio *bio; | |
7def52b7 MS |
1387 | unsigned long flags; |
1388 | ||
1389 | spin_lock_irqsave(&ic->endio_wait.lock, flags); | |
7eada909 MP |
1390 | bio = dm_bio_from_per_bio_data(dio, sizeof(struct dm_integrity_io)); |
1391 | bio_list_add(&ic->flush_bio_list, bio); | |
7def52b7 MS |
1392 | spin_unlock_irqrestore(&ic->endio_wait.lock, flags); |
1393 | ||
7eada909 MP |
1394 | queue_work(ic->commit_wq, &ic->commit_work); |
1395 | } | |
1396 | ||
1397 | static void do_endio(struct dm_integrity_c *ic, struct bio *bio) | |
1398 | { | |
1399 | int r = dm_integrity_failed(ic); | |
4e4cbee9 CH |
1400 | if (unlikely(r) && !bio->bi_status) |
1401 | bio->bi_status = errno_to_blk_status(r); | |
48271493 MP |
1402 | if (unlikely(ic->synchronous_mode) && bio_op(bio) == REQ_OP_WRITE) { |
1403 | unsigned long flags; | |
1404 | spin_lock_irqsave(&ic->endio_wait.lock, flags); | |
1405 | bio_list_add(&ic->synchronous_bios, bio); | |
1406 | queue_delayed_work(ic->commit_wq, &ic->bitmap_flush_work, 0); | |
1407 | spin_unlock_irqrestore(&ic->endio_wait.lock, flags); | |
1408 | return; | |
1409 | } | |
7eada909 MP |
1410 | bio_endio(bio); |
1411 | } | |
1412 | ||
1413 | static void do_endio_flush(struct dm_integrity_c *ic, struct dm_integrity_io *dio) | |
1414 | { | |
1415 | struct bio *bio = dm_bio_from_per_bio_data(dio, sizeof(struct dm_integrity_io)); | |
1416 | ||
4e4cbee9 | 1417 | if (unlikely(dio->fua) && likely(!bio->bi_status) && likely(!dm_integrity_failed(ic))) |
7eada909 MP |
1418 | submit_flush_bio(ic, dio); |
1419 | else | |
1420 | do_endio(ic, bio); | |
1421 | } | |
1422 | ||
1423 | static void dec_in_flight(struct dm_integrity_io *dio) | |
1424 | { | |
1425 | if (atomic_dec_and_test(&dio->in_flight)) { | |
1426 | struct dm_integrity_c *ic = dio->ic; | |
1427 | struct bio *bio; | |
1428 | ||
1429 | remove_range(ic, &dio->range); | |
1430 | ||
1431 | if (unlikely(dio->write)) | |
1432 | schedule_autocommit(ic); | |
1433 | ||
1434 | bio = dm_bio_from_per_bio_data(dio, sizeof(struct dm_integrity_io)); | |
1435 | ||
4e4cbee9 CH |
1436 | if (unlikely(dio->bi_status) && !bio->bi_status) |
1437 | bio->bi_status = dio->bi_status; | |
1438 | if (likely(!bio->bi_status) && unlikely(bio_sectors(bio) != dio->range.n_sectors)) { | |
7eada909 MP |
1439 | dio->range.logical_sector += dio->range.n_sectors; |
1440 | bio_advance(bio, dio->range.n_sectors << SECTOR_SHIFT); | |
1441 | INIT_WORK(&dio->work, integrity_bio_wait); | |
53770f0e | 1442 | queue_work(ic->offload_wq, &dio->work); |
7eada909 MP |
1443 | return; |
1444 | } | |
1445 | do_endio_flush(ic, dio); | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | static void integrity_end_io(struct bio *bio) | |
1450 | { | |
1451 | struct dm_integrity_io *dio = dm_per_bio_data(bio, sizeof(struct dm_integrity_io)); | |
1452 | ||
248aa264 MS |
1453 | dm_bio_restore(&dio->bio_details, bio); |
1454 | if (bio->bi_integrity) | |
7eada909 | 1455 | bio->bi_opf |= REQ_INTEGRITY; |
7eada909 MP |
1456 | |
1457 | if (dio->completion) | |
1458 | complete(dio->completion); | |
1459 | ||
1460 | dec_in_flight(dio); | |
1461 | } | |
1462 | ||
1463 | static void integrity_sector_checksum(struct dm_integrity_c *ic, sector_t sector, | |
1464 | const char *data, char *result) | |
1465 | { | |
1466 | __u64 sector_le = cpu_to_le64(sector); | |
1467 | SHASH_DESC_ON_STACK(req, ic->internal_hash); | |
1468 | int r; | |
1469 | unsigned digest_size; | |
1470 | ||
1471 | req->tfm = ic->internal_hash; | |
7eada909 MP |
1472 | |
1473 | r = crypto_shash_init(req); | |
1474 | if (unlikely(r < 0)) { | |
1475 | dm_integrity_io_error(ic, "crypto_shash_init", r); | |
1476 | goto failed; | |
1477 | } | |
1478 | ||
1479 | r = crypto_shash_update(req, (const __u8 *)§or_le, sizeof sector_le); | |
1480 | if (unlikely(r < 0)) { | |
1481 | dm_integrity_io_error(ic, "crypto_shash_update", r); | |
1482 | goto failed; | |
1483 | } | |
1484 | ||
9d609f85 | 1485 | r = crypto_shash_update(req, data, ic->sectors_per_block << SECTOR_SHIFT); |
7eada909 MP |
1486 | if (unlikely(r < 0)) { |
1487 | dm_integrity_io_error(ic, "crypto_shash_update", r); | |
1488 | goto failed; | |
1489 | } | |
1490 | ||
1491 | r = crypto_shash_final(req, result); | |
1492 | if (unlikely(r < 0)) { | |
1493 | dm_integrity_io_error(ic, "crypto_shash_final", r); | |
1494 | goto failed; | |
1495 | } | |
1496 | ||
1497 | digest_size = crypto_shash_digestsize(ic->internal_hash); | |
1498 | if (unlikely(digest_size < ic->tag_size)) | |
1499 | memset(result + digest_size, 0, ic->tag_size - digest_size); | |
1500 | ||
1501 | return; | |
1502 | ||
1503 | failed: | |
1504 | /* this shouldn't happen anyway, the hash functions have no reason to fail */ | |
1505 | get_random_bytes(result, ic->tag_size); | |
1506 | } | |
1507 | ||
1508 | static void integrity_metadata(struct work_struct *w) | |
1509 | { | |
1510 | struct dm_integrity_io *dio = container_of(w, struct dm_integrity_io, work); | |
1511 | struct dm_integrity_c *ic = dio->ic; | |
1512 | ||
1513 | int r; | |
1514 | ||
1515 | if (ic->internal_hash) { | |
1516 | struct bvec_iter iter; | |
1517 | struct bio_vec bv; | |
1518 | unsigned digest_size = crypto_shash_digestsize(ic->internal_hash); | |
1519 | struct bio *bio = dm_bio_from_per_bio_data(dio, sizeof(struct dm_integrity_io)); | |
1520 | char *checksums; | |
56b67a4f | 1521 | unsigned extra_space = unlikely(digest_size > ic->tag_size) ? digest_size - ic->tag_size : 0; |
6d39a124 | 1522 | char checksums_onstack[HASH_MAX_DIGESTSIZE]; |
7eada909 MP |
1523 | unsigned sectors_to_process = dio->range.n_sectors; |
1524 | sector_t sector = dio->range.logical_sector; | |
1525 | ||
c2bcb2b7 MP |
1526 | if (unlikely(ic->mode == 'R')) |
1527 | goto skip_io; | |
1528 | ||
9d609f85 | 1529 | checksums = kmalloc((PAGE_SIZE >> SECTOR_SHIFT >> ic->sb->log2_sectors_per_block) * ic->tag_size + extra_space, |
7eada909 | 1530 | GFP_NOIO | __GFP_NORETRY | __GFP_NOWARN); |
6d39a124 | 1531 | if (!checksums) { |
7eada909 | 1532 | checksums = checksums_onstack; |
6d39a124 KC |
1533 | if (WARN_ON(extra_space && |
1534 | digest_size > sizeof(checksums_onstack))) { | |
1535 | r = -EINVAL; | |
1536 | goto error; | |
1537 | } | |
1538 | } | |
7eada909 | 1539 | |
248aa264 | 1540 | __bio_for_each_segment(bv, bio, iter, dio->bio_details.bi_iter) { |
7eada909 MP |
1541 | unsigned pos; |
1542 | char *mem, *checksums_ptr; | |
1543 | ||
1544 | again: | |
1545 | mem = (char *)kmap_atomic(bv.bv_page) + bv.bv_offset; | |
1546 | pos = 0; | |
1547 | checksums_ptr = checksums; | |
1548 | do { | |
1549 | integrity_sector_checksum(ic, sector, mem + pos, checksums_ptr); | |
1550 | checksums_ptr += ic->tag_size; | |
9d609f85 MP |
1551 | sectors_to_process -= ic->sectors_per_block; |
1552 | pos += ic->sectors_per_block << SECTOR_SHIFT; | |
1553 | sector += ic->sectors_per_block; | |
7eada909 MP |
1554 | } while (pos < bv.bv_len && sectors_to_process && checksums != checksums_onstack); |
1555 | kunmap_atomic(mem); | |
1556 | ||
1557 | r = dm_integrity_rw_tag(ic, checksums, &dio->metadata_block, &dio->metadata_offset, | |
1558 | checksums_ptr - checksums, !dio->write ? TAG_CMP : TAG_WRITE); | |
1559 | if (unlikely(r)) { | |
1560 | if (r > 0) { | |
22555744 MP |
1561 | DMERR_LIMIT("Checksum failed at sector 0x%llx", |
1562 | (unsigned long long)(sector - ((r + ic->tag_size - 1) / ic->tag_size))); | |
7eada909 | 1563 | r = -EILSEQ; |
3f2e5393 | 1564 | atomic64_inc(&ic->number_of_mismatches); |
7eada909 MP |
1565 | } |
1566 | if (likely(checksums != checksums_onstack)) | |
1567 | kfree(checksums); | |
1568 | goto error; | |
1569 | } | |
1570 | ||
1571 | if (!sectors_to_process) | |
1572 | break; | |
1573 | ||
1574 | if (unlikely(pos < bv.bv_len)) { | |
1575 | bv.bv_offset += pos; | |
1576 | bv.bv_len -= pos; | |
1577 | goto again; | |
1578 | } | |
1579 | } | |
1580 | ||
1581 | if (likely(checksums != checksums_onstack)) | |
1582 | kfree(checksums); | |
1583 | } else { | |
248aa264 | 1584 | struct bio_integrity_payload *bip = dio->bio_details.bi_integrity; |
7eada909 MP |
1585 | |
1586 | if (bip) { | |
1587 | struct bio_vec biv; | |
1588 | struct bvec_iter iter; | |
9d609f85 MP |
1589 | unsigned data_to_process = dio->range.n_sectors; |
1590 | sector_to_block(ic, data_to_process); | |
1591 | data_to_process *= ic->tag_size; | |
7eada909 MP |
1592 | |
1593 | bip_for_each_vec(biv, bip, iter) { | |
1594 | unsigned char *tag; | |
1595 | unsigned this_len; | |
1596 | ||
1597 | BUG_ON(PageHighMem(biv.bv_page)); | |
1598 | tag = lowmem_page_address(biv.bv_page) + biv.bv_offset; | |
1599 | this_len = min(biv.bv_len, data_to_process); | |
1600 | r = dm_integrity_rw_tag(ic, tag, &dio->metadata_block, &dio->metadata_offset, | |
1601 | this_len, !dio->write ? TAG_READ : TAG_WRITE); | |
1602 | if (unlikely(r)) | |
1603 | goto error; | |
1604 | data_to_process -= this_len; | |
1605 | if (!data_to_process) | |
1606 | break; | |
1607 | } | |
1608 | } | |
1609 | } | |
c2bcb2b7 | 1610 | skip_io: |
7eada909 MP |
1611 | dec_in_flight(dio); |
1612 | return; | |
1613 | error: | |
4e4cbee9 | 1614 | dio->bi_status = errno_to_blk_status(r); |
7eada909 MP |
1615 | dec_in_flight(dio); |
1616 | } | |
1617 | ||
1618 | static int dm_integrity_map(struct dm_target *ti, struct bio *bio) | |
1619 | { | |
1620 | struct dm_integrity_c *ic = ti->private; | |
1621 | struct dm_integrity_io *dio = dm_per_bio_data(bio, sizeof(struct dm_integrity_io)); | |
9d609f85 | 1622 | struct bio_integrity_payload *bip; |
7eada909 MP |
1623 | |
1624 | sector_t area, offset; | |
1625 | ||
1626 | dio->ic = ic; | |
4e4cbee9 | 1627 | dio->bi_status = 0; |
7eada909 MP |
1628 | |
1629 | if (unlikely(bio->bi_opf & REQ_PREFLUSH)) { | |
1630 | submit_flush_bio(ic, dio); | |
1631 | return DM_MAPIO_SUBMITTED; | |
1632 | } | |
1633 | ||
1634 | dio->range.logical_sector = dm_target_offset(ti, bio->bi_iter.bi_sector); | |
1635 | dio->write = bio_op(bio) == REQ_OP_WRITE; | |
1636 | dio->fua = dio->write && bio->bi_opf & REQ_FUA; | |
1637 | if (unlikely(dio->fua)) { | |
1638 | /* | |
1639 | * Don't pass down the FUA flag because we have to flush | |
1640 | * disk cache anyway. | |
1641 | */ | |
1642 | bio->bi_opf &= ~REQ_FUA; | |
1643 | } | |
1644 | if (unlikely(dio->range.logical_sector + bio_sectors(bio) > ic->provided_data_sectors)) { | |
1645 | DMERR("Too big sector number: 0x%llx + 0x%x > 0x%llx", | |
1646 | (unsigned long long)dio->range.logical_sector, bio_sectors(bio), | |
1647 | (unsigned long long)ic->provided_data_sectors); | |
846785e6 | 1648 | return DM_MAPIO_KILL; |
7eada909 | 1649 | } |
9d609f85 MP |
1650 | if (unlikely((dio->range.logical_sector | bio_sectors(bio)) & (unsigned)(ic->sectors_per_block - 1))) { |
1651 | DMERR("Bio not aligned on %u sectors: 0x%llx, 0x%x", | |
1652 | ic->sectors_per_block, | |
1653 | (unsigned long long)dio->range.logical_sector, bio_sectors(bio)); | |
846785e6 | 1654 | return DM_MAPIO_KILL; |
9d609f85 MP |
1655 | } |
1656 | ||
1657 | if (ic->sectors_per_block > 1) { | |
1658 | struct bvec_iter iter; | |
1659 | struct bio_vec bv; | |
1660 | bio_for_each_segment(bv, bio, iter) { | |
95b1369a | 1661 | if (unlikely(bv.bv_len & ((ic->sectors_per_block << SECTOR_SHIFT) - 1))) { |
9d609f85 MP |
1662 | DMERR("Bio vector (%u,%u) is not aligned on %u-sector boundary", |
1663 | bv.bv_offset, bv.bv_len, ic->sectors_per_block); | |
846785e6 | 1664 | return DM_MAPIO_KILL; |
9d609f85 MP |
1665 | } |
1666 | } | |
1667 | } | |
1668 | ||
1669 | bip = bio_integrity(bio); | |
1670 | if (!ic->internal_hash) { | |
1671 | if (bip) { | |
1672 | unsigned wanted_tag_size = bio_sectors(bio) >> ic->sb->log2_sectors_per_block; | |
1673 | if (ic->log2_tag_size >= 0) | |
1674 | wanted_tag_size <<= ic->log2_tag_size; | |
1675 | else | |
1676 | wanted_tag_size *= ic->tag_size; | |
1677 | if (unlikely(wanted_tag_size != bip->bip_iter.bi_size)) { | |
05d6909e MS |
1678 | DMERR("Invalid integrity data size %u, expected %u", |
1679 | bip->bip_iter.bi_size, wanted_tag_size); | |
846785e6 | 1680 | return DM_MAPIO_KILL; |
9d609f85 MP |
1681 | } |
1682 | } | |
1683 | } else { | |
1684 | if (unlikely(bip != NULL)) { | |
1685 | DMERR("Unexpected integrity data when using internal hash"); | |
846785e6 | 1686 | return DM_MAPIO_KILL; |
9d609f85 MP |
1687 | } |
1688 | } | |
7eada909 | 1689 | |
c2bcb2b7 | 1690 | if (unlikely(ic->mode == 'R') && unlikely(dio->write)) |
846785e6 | 1691 | return DM_MAPIO_KILL; |
c2bcb2b7 | 1692 | |
7eada909 MP |
1693 | get_area_and_offset(ic, dio->range.logical_sector, &area, &offset); |
1694 | dio->metadata_block = get_metadata_sector_and_offset(ic, area, offset, &dio->metadata_offset); | |
1695 | bio->bi_iter.bi_sector = get_data_sector(ic, area, offset); | |
1696 | ||
1697 | dm_integrity_map_continue(dio, true); | |
1698 | return DM_MAPIO_SUBMITTED; | |
1699 | } | |
1700 | ||
1701 | static bool __journal_read_write(struct dm_integrity_io *dio, struct bio *bio, | |
1702 | unsigned journal_section, unsigned journal_entry) | |
1703 | { | |
1704 | struct dm_integrity_c *ic = dio->ic; | |
1705 | sector_t logical_sector; | |
1706 | unsigned n_sectors; | |
1707 | ||
1708 | logical_sector = dio->range.logical_sector; | |
1709 | n_sectors = dio->range.n_sectors; | |
1710 | do { | |
1711 | struct bio_vec bv = bio_iovec(bio); | |
1712 | char *mem; | |
1713 | ||
1714 | if (unlikely(bv.bv_len >> SECTOR_SHIFT > n_sectors)) | |
1715 | bv.bv_len = n_sectors << SECTOR_SHIFT; | |
1716 | n_sectors -= bv.bv_len >> SECTOR_SHIFT; | |
1717 | bio_advance_iter(bio, &bio->bi_iter, bv.bv_len); | |
1718 | retry_kmap: | |
1719 | mem = kmap_atomic(bv.bv_page); | |
1720 | if (likely(dio->write)) | |
1721 | flush_dcache_page(bv.bv_page); | |
1722 | ||
1723 | do { | |
1724 | struct journal_entry *je = access_journal_entry(ic, journal_section, journal_entry); | |
1725 | ||
1726 | if (unlikely(!dio->write)) { | |
1727 | struct journal_sector *js; | |
9d609f85 MP |
1728 | char *mem_ptr; |
1729 | unsigned s; | |
7eada909 MP |
1730 | |
1731 | if (unlikely(journal_entry_is_inprogress(je))) { | |
1732 | flush_dcache_page(bv.bv_page); | |
1733 | kunmap_atomic(mem); | |
1734 | ||
1735 | __io_wait_event(ic->copy_to_journal_wait, !journal_entry_is_inprogress(je)); | |
1736 | goto retry_kmap; | |
1737 | } | |
1738 | smp_rmb(); | |
1739 | BUG_ON(journal_entry_get_sector(je) != logical_sector); | |
1740 | js = access_journal_data(ic, journal_section, journal_entry); | |
9d609f85 MP |
1741 | mem_ptr = mem + bv.bv_offset; |
1742 | s = 0; | |
1743 | do { | |
1744 | memcpy(mem_ptr, js, JOURNAL_SECTOR_DATA); | |
1745 | *(commit_id_t *)(mem_ptr + JOURNAL_SECTOR_DATA) = je->last_bytes[s]; | |
1746 | js++; | |
1747 | mem_ptr += 1 << SECTOR_SHIFT; | |
1748 | } while (++s < ic->sectors_per_block); | |
7eada909 MP |
1749 | #ifdef INTERNAL_VERIFY |
1750 | if (ic->internal_hash) { | |
6d39a124 | 1751 | char checksums_onstack[max(HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)]; |
7eada909 MP |
1752 | |
1753 | integrity_sector_checksum(ic, logical_sector, mem + bv.bv_offset, checksums_onstack); | |
9d609f85 | 1754 | if (unlikely(memcmp(checksums_onstack, journal_entry_tag(ic, je), ic->tag_size))) { |
22555744 MP |
1755 | DMERR_LIMIT("Checksum failed when reading from journal, at sector 0x%llx", |
1756 | (unsigned long long)logical_sector); | |
7eada909 MP |
1757 | } |
1758 | } | |
1759 | #endif | |
1760 | } | |
1761 | ||
1762 | if (!ic->internal_hash) { | |
1763 | struct bio_integrity_payload *bip = bio_integrity(bio); | |
1764 | unsigned tag_todo = ic->tag_size; | |
9d609f85 | 1765 | char *tag_ptr = journal_entry_tag(ic, je); |
7eada909 MP |
1766 | |
1767 | if (bip) do { | |
1768 | struct bio_vec biv = bvec_iter_bvec(bip->bip_vec, bip->bip_iter); | |
1769 | unsigned tag_now = min(biv.bv_len, tag_todo); | |
1770 | char *tag_addr; | |
1771 | BUG_ON(PageHighMem(biv.bv_page)); | |
1772 | tag_addr = lowmem_page_address(biv.bv_page) + biv.bv_offset; | |
1773 | if (likely(dio->write)) | |
1774 | memcpy(tag_ptr, tag_addr, tag_now); | |
1775 | else | |
1776 | memcpy(tag_addr, tag_ptr, tag_now); | |
1777 | bvec_iter_advance(bip->bip_vec, &bip->bip_iter, tag_now); | |
1778 | tag_ptr += tag_now; | |
1779 | tag_todo -= tag_now; | |
1780 | } while (unlikely(tag_todo)); else { | |
1781 | if (likely(dio->write)) | |
1782 | memset(tag_ptr, 0, tag_todo); | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | if (likely(dio->write)) { | |
1787 | struct journal_sector *js; | |
9d609f85 | 1788 | unsigned s; |
7eada909 MP |
1789 | |
1790 | js = access_journal_data(ic, journal_section, journal_entry); | |
9d609f85 MP |
1791 | memcpy(js, mem + bv.bv_offset, ic->sectors_per_block << SECTOR_SHIFT); |
1792 | ||
1793 | s = 0; | |
1794 | do { | |
1795 | je->last_bytes[s] = js[s].commit_id; | |
1796 | } while (++s < ic->sectors_per_block); | |
7eada909 MP |
1797 | |
1798 | if (ic->internal_hash) { | |
1799 | unsigned digest_size = crypto_shash_digestsize(ic->internal_hash); | |
1800 | if (unlikely(digest_size > ic->tag_size)) { | |
6d39a124 | 1801 | char checksums_onstack[HASH_MAX_DIGESTSIZE]; |
7eada909 | 1802 | integrity_sector_checksum(ic, logical_sector, (char *)js, checksums_onstack); |
9d609f85 | 1803 | memcpy(journal_entry_tag(ic, je), checksums_onstack, ic->tag_size); |
7eada909 | 1804 | } else |
9d609f85 | 1805 | integrity_sector_checksum(ic, logical_sector, (char *)js, journal_entry_tag(ic, je)); |
7eada909 MP |
1806 | } |
1807 | ||
1808 | journal_entry_set_sector(je, logical_sector); | |
1809 | } | |
9d609f85 | 1810 | logical_sector += ic->sectors_per_block; |
7eada909 MP |
1811 | |
1812 | journal_entry++; | |
1813 | if (unlikely(journal_entry == ic->journal_section_entries)) { | |
1814 | journal_entry = 0; | |
1815 | journal_section++; | |
1816 | wraparound_section(ic, &journal_section); | |
1817 | } | |
1818 | ||
9d609f85 MP |
1819 | bv.bv_offset += ic->sectors_per_block << SECTOR_SHIFT; |
1820 | } while (bv.bv_len -= ic->sectors_per_block << SECTOR_SHIFT); | |
7eada909 MP |
1821 | |
1822 | if (unlikely(!dio->write)) | |
1823 | flush_dcache_page(bv.bv_page); | |
1824 | kunmap_atomic(mem); | |
1825 | } while (n_sectors); | |
1826 | ||
1827 | if (likely(dio->write)) { | |
1828 | smp_mb(); | |
1829 | if (unlikely(waitqueue_active(&ic->copy_to_journal_wait))) | |
1830 | wake_up(&ic->copy_to_journal_wait); | |
d3e632f0 | 1831 | if (READ_ONCE(ic->free_sectors) <= ic->free_sectors_threshold) { |
7eada909 MP |
1832 | queue_work(ic->commit_wq, &ic->commit_work); |
1833 | } else { | |
1834 | schedule_autocommit(ic); | |
1835 | } | |
1836 | } else { | |
1837 | remove_range(ic, &dio->range); | |
1838 | } | |
1839 | ||
1840 | if (unlikely(bio->bi_iter.bi_size)) { | |
1841 | sector_t area, offset; | |
1842 | ||
1843 | dio->range.logical_sector = logical_sector; | |
1844 | get_area_and_offset(ic, dio->range.logical_sector, &area, &offset); | |
1845 | dio->metadata_block = get_metadata_sector_and_offset(ic, area, offset, &dio->metadata_offset); | |
1846 | return true; | |
1847 | } | |
1848 | ||
1849 | return false; | |
1850 | } | |
1851 | ||
1852 | static void dm_integrity_map_continue(struct dm_integrity_io *dio, bool from_map) | |
1853 | { | |
1854 | struct dm_integrity_c *ic = dio->ic; | |
1855 | struct bio *bio = dm_bio_from_per_bio_data(dio, sizeof(struct dm_integrity_io)); | |
1856 | unsigned journal_section, journal_entry; | |
1857 | unsigned journal_read_pos; | |
1858 | struct completion read_comp; | |
1859 | bool need_sync_io = ic->internal_hash && !dio->write; | |
1860 | ||
1861 | if (need_sync_io && from_map) { | |
1862 | INIT_WORK(&dio->work, integrity_bio_wait); | |
53770f0e | 1863 | queue_work(ic->offload_wq, &dio->work); |
7eada909 MP |
1864 | return; |
1865 | } | |
1866 | ||
1867 | lock_retry: | |
1868 | spin_lock_irq(&ic->endio_wait.lock); | |
1869 | retry: | |
1870 | if (unlikely(dm_integrity_failed(ic))) { | |
1871 | spin_unlock_irq(&ic->endio_wait.lock); | |
1872 | do_endio(ic, bio); | |
1873 | return; | |
1874 | } | |
1875 | dio->range.n_sectors = bio_sectors(bio); | |
1876 | journal_read_pos = NOT_FOUND; | |
1877 | if (likely(ic->mode == 'J')) { | |
1878 | if (dio->write) { | |
1879 | unsigned next_entry, i, pos; | |
9dd59727 | 1880 | unsigned ws, we, range_sectors; |
7eada909 | 1881 | |
9dd59727 | 1882 | dio->range.n_sectors = min(dio->range.n_sectors, |
4f43446d | 1883 | (sector_t)ic->free_sectors << ic->sb->log2_sectors_per_block); |
518748b1 MP |
1884 | if (unlikely(!dio->range.n_sectors)) { |
1885 | if (from_map) | |
1886 | goto offload_to_thread; | |
1887 | sleep_on_endio_wait(ic); | |
1888 | goto retry; | |
1889 | } | |
9dd59727 MP |
1890 | range_sectors = dio->range.n_sectors >> ic->sb->log2_sectors_per_block; |
1891 | ic->free_sectors -= range_sectors; | |
7eada909 MP |
1892 | journal_section = ic->free_section; |
1893 | journal_entry = ic->free_section_entry; | |
1894 | ||
9dd59727 | 1895 | next_entry = ic->free_section_entry + range_sectors; |
7eada909 MP |
1896 | ic->free_section_entry = next_entry % ic->journal_section_entries; |
1897 | ic->free_section += next_entry / ic->journal_section_entries; | |
1898 | ic->n_uncommitted_sections += next_entry / ic->journal_section_entries; | |
1899 | wraparound_section(ic, &ic->free_section); | |
1900 | ||
1901 | pos = journal_section * ic->journal_section_entries + journal_entry; | |
1902 | ws = journal_section; | |
1903 | we = journal_entry; | |
9d609f85 MP |
1904 | i = 0; |
1905 | do { | |
7eada909 MP |
1906 | struct journal_entry *je; |
1907 | ||
1908 | add_journal_node(ic, &ic->journal_tree[pos], dio->range.logical_sector + i); | |
1909 | pos++; | |
1910 | if (unlikely(pos >= ic->journal_entries)) | |
1911 | pos = 0; | |
1912 | ||
1913 | je = access_journal_entry(ic, ws, we); | |
1914 | BUG_ON(!journal_entry_is_unused(je)); | |
1915 | journal_entry_set_inprogress(je); | |
1916 | we++; | |
1917 | if (unlikely(we == ic->journal_section_entries)) { | |
1918 | we = 0; | |
1919 | ws++; | |
1920 | wraparound_section(ic, &ws); | |
1921 | } | |
9d609f85 | 1922 | } while ((i += ic->sectors_per_block) < dio->range.n_sectors); |
7eada909 MP |
1923 | |
1924 | spin_unlock_irq(&ic->endio_wait.lock); | |
1925 | goto journal_read_write; | |
1926 | } else { | |
1927 | sector_t next_sector; | |
1928 | journal_read_pos = find_journal_node(ic, dio->range.logical_sector, &next_sector); | |
1929 | if (likely(journal_read_pos == NOT_FOUND)) { | |
1930 | if (unlikely(dio->range.n_sectors > next_sector - dio->range.logical_sector)) | |
1931 | dio->range.n_sectors = next_sector - dio->range.logical_sector; | |
1932 | } else { | |
1933 | unsigned i; | |
9d609f85 MP |
1934 | unsigned jp = journal_read_pos + 1; |
1935 | for (i = ic->sectors_per_block; i < dio->range.n_sectors; i += ic->sectors_per_block, jp++) { | |
1936 | if (!test_journal_node(ic, jp, dio->range.logical_sector + i)) | |
7eada909 MP |
1937 | break; |
1938 | } | |
1939 | dio->range.n_sectors = i; | |
1940 | } | |
1941 | } | |
1942 | } | |
724376a0 | 1943 | if (unlikely(!add_new_range(ic, &dio->range, true))) { |
7eada909 MP |
1944 | /* |
1945 | * We must not sleep in the request routine because it could | |
1946 | * stall bios on current->bio_list. | |
1947 | * So, we offload the bio to a workqueue if we have to sleep. | |
1948 | */ | |
7eada909 | 1949 | if (from_map) { |
518748b1 | 1950 | offload_to_thread: |
7eada909 MP |
1951 | spin_unlock_irq(&ic->endio_wait.lock); |
1952 | INIT_WORK(&dio->work, integrity_bio_wait); | |
1953 | queue_work(ic->wait_wq, &dio->work); | |
1954 | return; | |
7eada909 | 1955 | } |
5729b6e5 MP |
1956 | if (journal_read_pos != NOT_FOUND) |
1957 | dio->range.n_sectors = ic->sectors_per_block; | |
724376a0 | 1958 | wait_and_add_new_range(ic, &dio->range); |
5729b6e5 MP |
1959 | /* |
1960 | * wait_and_add_new_range drops the spinlock, so the journal | |
1961 | * may have been changed arbitrarily. We need to recheck. | |
1962 | * To simplify the code, we restrict I/O size to just one block. | |
1963 | */ | |
1964 | if (journal_read_pos != NOT_FOUND) { | |
1965 | sector_t next_sector; | |
1966 | unsigned new_pos = find_journal_node(ic, dio->range.logical_sector, &next_sector); | |
1967 | if (unlikely(new_pos != journal_read_pos)) { | |
1968 | remove_range_unlocked(ic, &dio->range); | |
1969 | goto retry; | |
1970 | } | |
1971 | } | |
7eada909 MP |
1972 | } |
1973 | spin_unlock_irq(&ic->endio_wait.lock); | |
1974 | ||
1975 | if (unlikely(journal_read_pos != NOT_FOUND)) { | |
1976 | journal_section = journal_read_pos / ic->journal_section_entries; | |
1977 | journal_entry = journal_read_pos % ic->journal_section_entries; | |
1978 | goto journal_read_write; | |
1979 | } | |
1980 | ||
468dfca3 | 1981 | if (ic->mode == 'B' && dio->write) { |
05d6909e MS |
1982 | if (!block_bitmap_op(ic, ic->may_write_bitmap, dio->range.logical_sector, |
1983 | dio->range.n_sectors, BITMAP_OP_TEST_ALL_SET)) { | |
1984 | struct bitmap_block_status *bbs; | |
468dfca3 | 1985 | |
05d6909e | 1986 | bbs = sector_to_bitmap_block(ic, dio->range.logical_sector); |
468dfca3 MP |
1987 | spin_lock(&bbs->bio_queue_lock); |
1988 | bio_list_add(&bbs->bio_queue, bio); | |
1989 | spin_unlock(&bbs->bio_queue_lock); | |
468dfca3 | 1990 | queue_work(ic->writer_wq, &bbs->work); |
468dfca3 MP |
1991 | return; |
1992 | } | |
1993 | } | |
1994 | ||
7eada909 MP |
1995 | dio->in_flight = (atomic_t)ATOMIC_INIT(2); |
1996 | ||
1997 | if (need_sync_io) { | |
b5e8ad92 | 1998 | init_completion(&read_comp); |
7eada909 MP |
1999 | dio->completion = &read_comp; |
2000 | } else | |
2001 | dio->completion = NULL; | |
2002 | ||
248aa264 | 2003 | dm_bio_record(&dio->bio_details, bio); |
74d46992 | 2004 | bio_set_dev(bio, ic->dev->bdev); |
7eada909 MP |
2005 | bio->bi_integrity = NULL; |
2006 | bio->bi_opf &= ~REQ_INTEGRITY; | |
7eada909 | 2007 | bio->bi_end_io = integrity_end_io; |
7eada909 | 2008 | bio->bi_iter.bi_size = dio->range.n_sectors << SECTOR_SHIFT; |
248aa264 | 2009 | |
7eada909 MP |
2010 | generic_make_request(bio); |
2011 | ||
2012 | if (need_sync_io) { | |
2013 | wait_for_completion_io(&read_comp); | |
468dfca3 | 2014 | if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING) && |
a3fcf725 MP |
2015 | dio->range.logical_sector + dio->range.n_sectors > le64_to_cpu(ic->sb->recalc_sector)) |
2016 | goto skip_check; | |
468dfca3 | 2017 | if (ic->mode == 'B') { |
05d6909e MS |
2018 | if (!block_bitmap_op(ic, ic->recalc_bitmap, dio->range.logical_sector, |
2019 | dio->range.n_sectors, BITMAP_OP_TEST_ALL_CLEAR)) | |
468dfca3 MP |
2020 | goto skip_check; |
2021 | } | |
2022 | ||
b7e326f7 HL |
2023 | if (likely(!bio->bi_status)) |
2024 | integrity_metadata(&dio->work); | |
2025 | else | |
a3fcf725 | 2026 | skip_check: |
b7e326f7 HL |
2027 | dec_in_flight(dio); |
2028 | ||
7eada909 MP |
2029 | } else { |
2030 | INIT_WORK(&dio->work, integrity_metadata); | |
2031 | queue_work(ic->metadata_wq, &dio->work); | |
2032 | } | |
2033 | ||
2034 | return; | |
2035 | ||
2036 | journal_read_write: | |
2037 | if (unlikely(__journal_read_write(dio, bio, journal_section, journal_entry))) | |
2038 | goto lock_retry; | |
2039 | ||
2040 | do_endio_flush(ic, dio); | |
2041 | } | |
2042 | ||
2043 | ||
2044 | static void integrity_bio_wait(struct work_struct *w) | |
2045 | { | |
2046 | struct dm_integrity_io *dio = container_of(w, struct dm_integrity_io, work); | |
2047 | ||
2048 | dm_integrity_map_continue(dio, false); | |
2049 | } | |
2050 | ||
2051 | static void pad_uncommitted(struct dm_integrity_c *ic) | |
2052 | { | |
2053 | if (ic->free_section_entry) { | |
2054 | ic->free_sectors -= ic->journal_section_entries - ic->free_section_entry; | |
2055 | ic->free_section_entry = 0; | |
2056 | ic->free_section++; | |
2057 | wraparound_section(ic, &ic->free_section); | |
2058 | ic->n_uncommitted_sections++; | |
2059 | } | |
468dfca3 | 2060 | if (WARN_ON(ic->journal_sections * ic->journal_section_entries != |
05d6909e MS |
2061 | (ic->n_uncommitted_sections + ic->n_committed_sections) * |
2062 | ic->journal_section_entries + ic->free_sectors)) { | |
2063 | DMCRIT("journal_sections %u, journal_section_entries %u, " | |
2064 | "n_uncommitted_sections %u, n_committed_sections %u, " | |
2065 | "journal_section_entries %u, free_sectors %u", | |
2066 | ic->journal_sections, ic->journal_section_entries, | |
2067 | ic->n_uncommitted_sections, ic->n_committed_sections, | |
2068 | ic->journal_section_entries, ic->free_sectors); | |
468dfca3 | 2069 | } |
7eada909 MP |
2070 | } |
2071 | ||
2072 | static void integrity_commit(struct work_struct *w) | |
2073 | { | |
2074 | struct dm_integrity_c *ic = container_of(w, struct dm_integrity_c, commit_work); | |
2075 | unsigned commit_start, commit_sections; | |
2076 | unsigned i, j, n; | |
2077 | struct bio *flushes; | |
2078 | ||
2079 | del_timer(&ic->autocommit_timer); | |
2080 | ||
2081 | spin_lock_irq(&ic->endio_wait.lock); | |
2082 | flushes = bio_list_get(&ic->flush_bio_list); | |
2083 | if (unlikely(ic->mode != 'J')) { | |
2084 | spin_unlock_irq(&ic->endio_wait.lock); | |
2085 | dm_integrity_flush_buffers(ic); | |
2086 | goto release_flush_bios; | |
2087 | } | |
2088 | ||
2089 | pad_uncommitted(ic); | |
2090 | commit_start = ic->uncommitted_section; | |
2091 | commit_sections = ic->n_uncommitted_sections; | |
2092 | spin_unlock_irq(&ic->endio_wait.lock); | |
2093 | ||
2094 | if (!commit_sections) | |
2095 | goto release_flush_bios; | |
2096 | ||
2097 | i = commit_start; | |
2098 | for (n = 0; n < commit_sections; n++) { | |
2099 | for (j = 0; j < ic->journal_section_entries; j++) { | |
2100 | struct journal_entry *je; | |
2101 | je = access_journal_entry(ic, i, j); | |
2102 | io_wait_event(ic->copy_to_journal_wait, !journal_entry_is_inprogress(je)); | |
2103 | } | |
2104 | for (j = 0; j < ic->journal_section_sectors; j++) { | |
2105 | struct journal_sector *js; | |
2106 | js = access_journal(ic, i, j); | |
2107 | js->commit_id = dm_integrity_commit_id(ic, i, j, ic->commit_seq); | |
2108 | } | |
2109 | i++; | |
2110 | if (unlikely(i >= ic->journal_sections)) | |
2111 | ic->commit_seq = next_commit_seq(ic->commit_seq); | |
2112 | wraparound_section(ic, &i); | |
2113 | } | |
2114 | smp_rmb(); | |
2115 | ||
2116 | write_journal(ic, commit_start, commit_sections); | |
2117 | ||
2118 | spin_lock_irq(&ic->endio_wait.lock); | |
2119 | ic->uncommitted_section += commit_sections; | |
2120 | wraparound_section(ic, &ic->uncommitted_section); | |
2121 | ic->n_uncommitted_sections -= commit_sections; | |
2122 | ic->n_committed_sections += commit_sections; | |
2123 | spin_unlock_irq(&ic->endio_wait.lock); | |
2124 | ||
d3e632f0 | 2125 | if (READ_ONCE(ic->free_sectors) <= ic->free_sectors_threshold) |
7eada909 MP |
2126 | queue_work(ic->writer_wq, &ic->writer_work); |
2127 | ||
2128 | release_flush_bios: | |
2129 | while (flushes) { | |
2130 | struct bio *next = flushes->bi_next; | |
2131 | flushes->bi_next = NULL; | |
2132 | do_endio(ic, flushes); | |
2133 | flushes = next; | |
2134 | } | |
2135 | } | |
2136 | ||
2137 | static void complete_copy_from_journal(unsigned long error, void *context) | |
2138 | { | |
2139 | struct journal_io *io = context; | |
2140 | struct journal_completion *comp = io->comp; | |
2141 | struct dm_integrity_c *ic = comp->ic; | |
2142 | remove_range(ic, &io->range); | |
6f1c819c | 2143 | mempool_free(io, &ic->journal_io_mempool); |
7eada909 MP |
2144 | if (unlikely(error != 0)) |
2145 | dm_integrity_io_error(ic, "copying from journal", -EIO); | |
2146 | complete_journal_op(comp); | |
2147 | } | |
2148 | ||
9d609f85 MP |
2149 | static void restore_last_bytes(struct dm_integrity_c *ic, struct journal_sector *js, |
2150 | struct journal_entry *je) | |
2151 | { | |
2152 | unsigned s = 0; | |
2153 | do { | |
2154 | js->commit_id = je->last_bytes[s]; | |
2155 | js++; | |
2156 | } while (++s < ic->sectors_per_block); | |
2157 | } | |
2158 | ||
7eada909 MP |
2159 | static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start, |
2160 | unsigned write_sections, bool from_replay) | |
2161 | { | |
2162 | unsigned i, j, n; | |
2163 | struct journal_completion comp; | |
a7c3e62b MP |
2164 | struct blk_plug plug; |
2165 | ||
2166 | blk_start_plug(&plug); | |
7eada909 MP |
2167 | |
2168 | comp.ic = ic; | |
2169 | comp.in_flight = (atomic_t)ATOMIC_INIT(1); | |
b5e8ad92 | 2170 | init_completion(&comp.comp); |
7eada909 MP |
2171 | |
2172 | i = write_start; | |
2173 | for (n = 0; n < write_sections; n++, i++, wraparound_section(ic, &i)) { | |
2174 | #ifndef INTERNAL_VERIFY | |
2175 | if (unlikely(from_replay)) | |
2176 | #endif | |
2177 | rw_section_mac(ic, i, false); | |
2178 | for (j = 0; j < ic->journal_section_entries; j++) { | |
2179 | struct journal_entry *je = access_journal_entry(ic, i, j); | |
2180 | sector_t sec, area, offset; | |
2181 | unsigned k, l, next_loop; | |
2182 | sector_t metadata_block; | |
2183 | unsigned metadata_offset; | |
2184 | struct journal_io *io; | |
2185 | ||
2186 | if (journal_entry_is_unused(je)) | |
2187 | continue; | |
2188 | BUG_ON(unlikely(journal_entry_is_inprogress(je)) && !from_replay); | |
2189 | sec = journal_entry_get_sector(je); | |
9d609f85 MP |
2190 | if (unlikely(from_replay)) { |
2191 | if (unlikely(sec & (unsigned)(ic->sectors_per_block - 1))) { | |
2192 | dm_integrity_io_error(ic, "invalid sector in journal", -EIO); | |
2193 | sec &= ~(sector_t)(ic->sectors_per_block - 1); | |
2194 | } | |
2195 | } | |
7eada909 | 2196 | get_area_and_offset(ic, sec, &area, &offset); |
9d609f85 | 2197 | restore_last_bytes(ic, access_journal_data(ic, i, j), je); |
7eada909 MP |
2198 | for (k = j + 1; k < ic->journal_section_entries; k++) { |
2199 | struct journal_entry *je2 = access_journal_entry(ic, i, k); | |
2200 | sector_t sec2, area2, offset2; | |
2201 | if (journal_entry_is_unused(je2)) | |
2202 | break; | |
2203 | BUG_ON(unlikely(journal_entry_is_inprogress(je2)) && !from_replay); | |
2204 | sec2 = journal_entry_get_sector(je2); | |
2205 | get_area_and_offset(ic, sec2, &area2, &offset2); | |
9d609f85 | 2206 | if (area2 != area || offset2 != offset + ((k - j) << ic->sb->log2_sectors_per_block)) |
7eada909 | 2207 | break; |
9d609f85 | 2208 | restore_last_bytes(ic, access_journal_data(ic, i, k), je2); |
7eada909 MP |
2209 | } |
2210 | next_loop = k - 1; | |
2211 | ||
6f1c819c | 2212 | io = mempool_alloc(&ic->journal_io_mempool, GFP_NOIO); |
7eada909 MP |
2213 | io->comp = ∁ |
2214 | io->range.logical_sector = sec; | |
9d609f85 | 2215 | io->range.n_sectors = (k - j) << ic->sb->log2_sectors_per_block; |
7eada909 MP |
2216 | |
2217 | spin_lock_irq(&ic->endio_wait.lock); | |
8b3bbd49 | 2218 | add_new_range_and_wait(ic, &io->range); |
7eada909 MP |
2219 | |
2220 | if (likely(!from_replay)) { | |
2221 | struct journal_node *section_node = &ic->journal_tree[i * ic->journal_section_entries]; | |
2222 | ||
2223 | /* don't write if there is newer committed sector */ | |
2224 | while (j < k && find_newer_committed_node(ic, §ion_node[j])) { | |
2225 | struct journal_entry *je2 = access_journal_entry(ic, i, j); | |
2226 | ||
2227 | journal_entry_set_unused(je2); | |
2228 | remove_journal_node(ic, §ion_node[j]); | |
2229 | j++; | |
9d609f85 MP |
2230 | sec += ic->sectors_per_block; |
2231 | offset += ic->sectors_per_block; | |
7eada909 MP |
2232 | } |
2233 | while (j < k && find_newer_committed_node(ic, §ion_node[k - 1])) { | |
2234 | struct journal_entry *je2 = access_journal_entry(ic, i, k - 1); | |
2235 | ||
2236 | journal_entry_set_unused(je2); | |
2237 | remove_journal_node(ic, §ion_node[k - 1]); | |
2238 | k--; | |
2239 | } | |
2240 | if (j == k) { | |
2241 | remove_range_unlocked(ic, &io->range); | |
2242 | spin_unlock_irq(&ic->endio_wait.lock); | |
6f1c819c | 2243 | mempool_free(io, &ic->journal_io_mempool); |
7eada909 MP |
2244 | goto skip_io; |
2245 | } | |
2246 | for (l = j; l < k; l++) { | |
2247 | remove_journal_node(ic, §ion_node[l]); | |
2248 | } | |
2249 | } | |
2250 | spin_unlock_irq(&ic->endio_wait.lock); | |
2251 | ||
2252 | metadata_block = get_metadata_sector_and_offset(ic, area, offset, &metadata_offset); | |
2253 | for (l = j; l < k; l++) { | |
2254 | int r; | |
2255 | struct journal_entry *je2 = access_journal_entry(ic, i, l); | |
2256 | ||
2257 | if ( | |
2258 | #ifndef INTERNAL_VERIFY | |
2259 | unlikely(from_replay) && | |
2260 | #endif | |
2261 | ic->internal_hash) { | |
6d39a124 | 2262 | char test_tag[max_t(size_t, HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)]; |
7eada909 | 2263 | |
9d609f85 | 2264 | integrity_sector_checksum(ic, sec + ((l - j) << ic->sb->log2_sectors_per_block), |
7eada909 | 2265 | (char *)access_journal_data(ic, i, l), test_tag); |
9d609f85 | 2266 | if (unlikely(memcmp(test_tag, journal_entry_tag(ic, je2), ic->tag_size))) |
7eada909 MP |
2267 | dm_integrity_io_error(ic, "tag mismatch when replaying journal", -EILSEQ); |
2268 | } | |
2269 | ||
2270 | journal_entry_set_unused(je2); | |
9d609f85 | 2271 | r = dm_integrity_rw_tag(ic, journal_entry_tag(ic, je2), &metadata_block, &metadata_offset, |
7eada909 MP |
2272 | ic->tag_size, TAG_WRITE); |
2273 | if (unlikely(r)) { | |
2274 | dm_integrity_io_error(ic, "reading tags", r); | |
2275 | } | |
2276 | } | |
2277 | ||
2278 | atomic_inc(&comp.in_flight); | |
9d609f85 MP |
2279 | copy_from_journal(ic, i, j << ic->sb->log2_sectors_per_block, |
2280 | (k - j) << ic->sb->log2_sectors_per_block, | |
2281 | get_data_sector(ic, area, offset), | |
7eada909 MP |
2282 | complete_copy_from_journal, io); |
2283 | skip_io: | |
2284 | j = next_loop; | |
2285 | } | |
2286 | } | |
2287 | ||
2288 | dm_bufio_write_dirty_buffers_async(ic->bufio); | |
2289 | ||
a7c3e62b MP |
2290 | blk_finish_plug(&plug); |
2291 | ||
7eada909 MP |
2292 | complete_journal_op(&comp); |
2293 | wait_for_completion_io(&comp.comp); | |
2294 | ||
2295 | dm_integrity_flush_buffers(ic); | |
2296 | } | |
2297 | ||
2298 | static void integrity_writer(struct work_struct *w) | |
2299 | { | |
2300 | struct dm_integrity_c *ic = container_of(w, struct dm_integrity_c, writer_work); | |
2301 | unsigned write_start, write_sections; | |
2302 | ||
2303 | unsigned prev_free_sectors; | |
2304 | ||
2305 | /* the following test is not needed, but it tests the replay code */ | |
adc0daad | 2306 | if (unlikely(dm_suspended(ic->ti)) && !ic->meta_dev) |
7eada909 MP |
2307 | return; |
2308 | ||
2309 | spin_lock_irq(&ic->endio_wait.lock); | |
2310 | write_start = ic->committed_section; | |
2311 | write_sections = ic->n_committed_sections; | |
2312 | spin_unlock_irq(&ic->endio_wait.lock); | |
2313 | ||
2314 | if (!write_sections) | |
2315 | return; | |
2316 | ||
2317 | do_journal_write(ic, write_start, write_sections, false); | |
2318 | ||
2319 | spin_lock_irq(&ic->endio_wait.lock); | |
2320 | ||
2321 | ic->committed_section += write_sections; | |
2322 | wraparound_section(ic, &ic->committed_section); | |
2323 | ic->n_committed_sections -= write_sections; | |
2324 | ||
2325 | prev_free_sectors = ic->free_sectors; | |
2326 | ic->free_sectors += write_sections * ic->journal_section_entries; | |
2327 | if (unlikely(!prev_free_sectors)) | |
2328 | wake_up_locked(&ic->endio_wait); | |
2329 | ||
2330 | spin_unlock_irq(&ic->endio_wait.lock); | |
2331 | } | |
2332 | ||
a3fcf725 MP |
2333 | static void recalc_write_super(struct dm_integrity_c *ic) |
2334 | { | |
2335 | int r; | |
2336 | ||
2337 | dm_integrity_flush_buffers(ic); | |
2338 | if (dm_integrity_failed(ic)) | |
2339 | return; | |
2340 | ||
a3fcf725 MP |
2341 | r = sync_rw_sb(ic, REQ_OP_WRITE, 0); |
2342 | if (unlikely(r)) | |
2343 | dm_integrity_io_error(ic, "writing superblock", r); | |
2344 | } | |
2345 | ||
2346 | static void integrity_recalc(struct work_struct *w) | |
2347 | { | |
2348 | struct dm_integrity_c *ic = container_of(w, struct dm_integrity_c, recalc_work); | |
2349 | struct dm_integrity_range range; | |
2350 | struct dm_io_request io_req; | |
2351 | struct dm_io_region io_loc; | |
2352 | sector_t area, offset; | |
2353 | sector_t metadata_block; | |
2354 | unsigned metadata_offset; | |
468dfca3 | 2355 | sector_t logical_sector, n_sectors; |
a3fcf725 MP |
2356 | __u8 *t; |
2357 | unsigned i; | |
2358 | int r; | |
2359 | unsigned super_counter = 0; | |
2360 | ||
468dfca3 MP |
2361 | DEBUG_print("start recalculation... (position %llx)\n", le64_to_cpu(ic->sb->recalc_sector)); |
2362 | ||
a3fcf725 MP |
2363 | spin_lock_irq(&ic->endio_wait.lock); |
2364 | ||
2365 | next_chunk: | |
2366 | ||
adc0daad | 2367 | if (unlikely(dm_suspended(ic->ti))) |
a3fcf725 MP |
2368 | goto unlock_ret; |
2369 | ||
2370 | range.logical_sector = le64_to_cpu(ic->sb->recalc_sector); | |
468dfca3 MP |
2371 | if (unlikely(range.logical_sector >= ic->provided_data_sectors)) { |
2372 | if (ic->mode == 'B') { | |
2373 | DEBUG_print("queue_delayed_work: bitmap_flush_work\n"); | |
2374 | queue_delayed_work(ic->commit_wq, &ic->bitmap_flush_work, 0); | |
2375 | } | |
a3fcf725 | 2376 | goto unlock_ret; |
468dfca3 | 2377 | } |
a3fcf725 MP |
2378 | |
2379 | get_area_and_offset(ic, range.logical_sector, &area, &offset); | |
2380 | range.n_sectors = min((sector_t)RECALC_SECTORS, ic->provided_data_sectors - range.logical_sector); | |
2381 | if (!ic->meta_dev) | |
4f43446d | 2382 | range.n_sectors = min(range.n_sectors, ((sector_t)1U << ic->sb->log2_interleave_sectors) - (unsigned)offset); |
a3fcf725 | 2383 | |
8b3bbd49 | 2384 | add_new_range_and_wait(ic, &range); |
a3fcf725 | 2385 | spin_unlock_irq(&ic->endio_wait.lock); |
468dfca3 MP |
2386 | logical_sector = range.logical_sector; |
2387 | n_sectors = range.n_sectors; | |
2388 | ||
2389 | if (ic->mode == 'B') { | |
2390 | if (block_bitmap_op(ic, ic->recalc_bitmap, logical_sector, n_sectors, BITMAP_OP_TEST_ALL_CLEAR)) { | |
2391 | goto advance_and_next; | |
2392 | } | |
05d6909e MS |
2393 | while (block_bitmap_op(ic, ic->recalc_bitmap, logical_sector, |
2394 | ic->sectors_per_block, BITMAP_OP_TEST_ALL_CLEAR)) { | |
468dfca3 MP |
2395 | logical_sector += ic->sectors_per_block; |
2396 | n_sectors -= ic->sectors_per_block; | |
2397 | cond_resched(); | |
2398 | } | |
05d6909e MS |
2399 | while (block_bitmap_op(ic, ic->recalc_bitmap, logical_sector + n_sectors - ic->sectors_per_block, |
2400 | ic->sectors_per_block, BITMAP_OP_TEST_ALL_CLEAR)) { | |
468dfca3 MP |
2401 | n_sectors -= ic->sectors_per_block; |
2402 | cond_resched(); | |
2403 | } | |
2404 | get_area_and_offset(ic, logical_sector, &area, &offset); | |
2405 | } | |
2406 | ||
2407 | DEBUG_print("recalculating: %lx, %lx\n", logical_sector, n_sectors); | |
a3fcf725 MP |
2408 | |
2409 | if (unlikely(++super_counter == RECALC_WRITE_SUPER)) { | |
2410 | recalc_write_super(ic); | |
468dfca3 MP |
2411 | if (ic->mode == 'B') { |
2412 | queue_delayed_work(ic->commit_wq, &ic->bitmap_flush_work, ic->bitmap_flush_interval); | |
2413 | } | |
a3fcf725 MP |
2414 | super_counter = 0; |
2415 | } | |
2416 | ||
2417 | if (unlikely(dm_integrity_failed(ic))) | |
2418 | goto err; | |
2419 | ||
2420 | io_req.bi_op = REQ_OP_READ; | |
2421 | io_req.bi_op_flags = 0; | |
2422 | io_req.mem.type = DM_IO_VMA; | |
2423 | io_req.mem.ptr.addr = ic->recalc_buffer; | |
2424 | io_req.notify.fn = NULL; | |
2425 | io_req.client = ic->io; | |
2426 | io_loc.bdev = ic->dev->bdev; | |
2427 | io_loc.sector = get_data_sector(ic, area, offset); | |
468dfca3 | 2428 | io_loc.count = n_sectors; |
a3fcf725 MP |
2429 | |
2430 | r = dm_io(&io_req, 1, &io_loc, NULL); | |
2431 | if (unlikely(r)) { | |
2432 | dm_integrity_io_error(ic, "reading data", r); | |
2433 | goto err; | |
2434 | } | |
2435 | ||
2436 | t = ic->recalc_tags; | |
468dfca3 MP |
2437 | for (i = 0; i < n_sectors; i += ic->sectors_per_block) { |
2438 | integrity_sector_checksum(ic, logical_sector + i, ic->recalc_buffer + (i << SECTOR_SHIFT), t); | |
a3fcf725 MP |
2439 | t += ic->tag_size; |
2440 | } | |
2441 | ||
2442 | metadata_block = get_metadata_sector_and_offset(ic, area, offset, &metadata_offset); | |
2443 | ||
2444 | r = dm_integrity_rw_tag(ic, ic->recalc_tags, &metadata_block, &metadata_offset, t - ic->recalc_tags, TAG_WRITE); | |
2445 | if (unlikely(r)) { | |
2446 | dm_integrity_io_error(ic, "writing tags", r); | |
2447 | goto err; | |
2448 | } | |
2449 | ||
468dfca3 MP |
2450 | advance_and_next: |
2451 | cond_resched(); | |
2452 | ||
a3fcf725 MP |
2453 | spin_lock_irq(&ic->endio_wait.lock); |
2454 | remove_range_unlocked(ic, &range); | |
2455 | ic->sb->recalc_sector = cpu_to_le64(range.logical_sector + range.n_sectors); | |
2456 | goto next_chunk; | |
2457 | ||
2458 | err: | |
2459 | remove_range(ic, &range); | |
2460 | return; | |
2461 | ||
2462 | unlock_ret: | |
2463 | spin_unlock_irq(&ic->endio_wait.lock); | |
2464 | ||
2465 | recalc_write_super(ic); | |
2466 | } | |
2467 | ||
468dfca3 MP |
2468 | static void bitmap_block_work(struct work_struct *w) |
2469 | { | |
2470 | struct bitmap_block_status *bbs = container_of(w, struct bitmap_block_status, work); | |
2471 | struct dm_integrity_c *ic = bbs->ic; | |
2472 | struct bio *bio; | |
2473 | struct bio_list bio_queue; | |
2474 | struct bio_list waiting; | |
2475 | ||
2476 | bio_list_init(&waiting); | |
2477 | ||
2478 | spin_lock(&bbs->bio_queue_lock); | |
2479 | bio_queue = bbs->bio_queue; | |
2480 | bio_list_init(&bbs->bio_queue); | |
2481 | spin_unlock(&bbs->bio_queue_lock); | |
2482 | ||
2483 | while ((bio = bio_list_pop(&bio_queue))) { | |
2484 | struct dm_integrity_io *dio; | |
2485 | ||
2486 | dio = dm_per_bio_data(bio, sizeof(struct dm_integrity_io)); | |
2487 | ||
05d6909e MS |
2488 | if (block_bitmap_op(ic, ic->may_write_bitmap, dio->range.logical_sector, |
2489 | dio->range.n_sectors, BITMAP_OP_TEST_ALL_SET)) { | |
468dfca3 MP |
2490 | remove_range(ic, &dio->range); |
2491 | INIT_WORK(&dio->work, integrity_bio_wait); | |
53770f0e | 2492 | queue_work(ic->offload_wq, &dio->work); |
468dfca3 | 2493 | } else { |
05d6909e MS |
2494 | block_bitmap_op(ic, ic->journal, dio->range.logical_sector, |
2495 | dio->range.n_sectors, BITMAP_OP_SET); | |
468dfca3 MP |
2496 | bio_list_add(&waiting, bio); |
2497 | } | |
2498 | } | |
2499 | ||
2500 | if (bio_list_empty(&waiting)) | |
2501 | return; | |
2502 | ||
05d6909e MS |
2503 | rw_journal_sectors(ic, REQ_OP_WRITE, REQ_FUA | REQ_SYNC, |
2504 | bbs->idx * (BITMAP_BLOCK_SIZE >> SECTOR_SHIFT), | |
2505 | BITMAP_BLOCK_SIZE >> SECTOR_SHIFT, NULL); | |
468dfca3 MP |
2506 | |
2507 | while ((bio = bio_list_pop(&waiting))) { | |
2508 | struct dm_integrity_io *dio = dm_per_bio_data(bio, sizeof(struct dm_integrity_io)); | |
2509 | ||
05d6909e MS |
2510 | block_bitmap_op(ic, ic->may_write_bitmap, dio->range.logical_sector, |
2511 | dio->range.n_sectors, BITMAP_OP_SET); | |
468dfca3 MP |
2512 | |
2513 | remove_range(ic, &dio->range); | |
2514 | INIT_WORK(&dio->work, integrity_bio_wait); | |
53770f0e | 2515 | queue_work(ic->offload_wq, &dio->work); |
468dfca3 MP |
2516 | } |
2517 | ||
2518 | queue_delayed_work(ic->commit_wq, &ic->bitmap_flush_work, ic->bitmap_flush_interval); | |
2519 | } | |
2520 | ||
2521 | static void bitmap_flush_work(struct work_struct *work) | |
2522 | { | |
2523 | struct dm_integrity_c *ic = container_of(work, struct dm_integrity_c, bitmap_flush_work.work); | |
2524 | struct dm_integrity_range range; | |
2525 | unsigned long limit; | |
48271493 | 2526 | struct bio *bio; |
468dfca3 MP |
2527 | |
2528 | dm_integrity_flush_buffers(ic); | |
2529 | ||
2530 | range.logical_sector = 0; | |
2531 | range.n_sectors = ic->provided_data_sectors; | |
2532 | ||
2533 | spin_lock_irq(&ic->endio_wait.lock); | |
2534 | add_new_range_and_wait(ic, &range); | |
2535 | spin_unlock_irq(&ic->endio_wait.lock); | |
2536 | ||
2537 | dm_integrity_flush_buffers(ic); | |
2538 | if (ic->meta_dev) | |
2539 | blkdev_issue_flush(ic->dev->bdev, GFP_NOIO, NULL); | |
2540 | ||
2541 | limit = ic->provided_data_sectors; | |
2542 | if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) { | |
2543 | limit = le64_to_cpu(ic->sb->recalc_sector) | |
2544 | >> (ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit) | |
2545 | << (ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit); | |
2546 | } | |
48271493 | 2547 | /*DEBUG_print("zeroing journal\n");*/ |
468dfca3 MP |
2548 | block_bitmap_op(ic, ic->journal, 0, limit, BITMAP_OP_CLEAR); |
2549 | block_bitmap_op(ic, ic->may_write_bitmap, 0, limit, BITMAP_OP_CLEAR); | |
2550 | ||
05d6909e MS |
2551 | rw_journal_sectors(ic, REQ_OP_WRITE, REQ_FUA | REQ_SYNC, 0, |
2552 | ic->n_bitmap_blocks * (BITMAP_BLOCK_SIZE >> SECTOR_SHIFT), NULL); | |
468dfca3 | 2553 | |
48271493 MP |
2554 | spin_lock_irq(&ic->endio_wait.lock); |
2555 | remove_range_unlocked(ic, &range); | |
2556 | while (unlikely((bio = bio_list_pop(&ic->synchronous_bios)) != NULL)) { | |
2557 | bio_endio(bio); | |
2558 | spin_unlock_irq(&ic->endio_wait.lock); | |
2559 | spin_lock_irq(&ic->endio_wait.lock); | |
2560 | } | |
2561 | spin_unlock_irq(&ic->endio_wait.lock); | |
468dfca3 MP |
2562 | } |
2563 | ||
2564 | ||
7eada909 MP |
2565 | static void init_journal(struct dm_integrity_c *ic, unsigned start_section, |
2566 | unsigned n_sections, unsigned char commit_seq) | |
2567 | { | |
2568 | unsigned i, j, n; | |
2569 | ||
2570 | if (!n_sections) | |
2571 | return; | |
2572 | ||
2573 | for (n = 0; n < n_sections; n++) { | |
2574 | i = start_section + n; | |
2575 | wraparound_section(ic, &i); | |
2576 | for (j = 0; j < ic->journal_section_sectors; j++) { | |
2577 | struct journal_sector *js = access_journal(ic, i, j); | |
2578 | memset(&js->entries, 0, JOURNAL_SECTOR_DATA); | |
2579 | js->commit_id = dm_integrity_commit_id(ic, i, j, commit_seq); | |
2580 | } | |
2581 | for (j = 0; j < ic->journal_section_entries; j++) { | |
2582 | struct journal_entry *je = access_journal_entry(ic, i, j); | |
2583 | journal_entry_set_unused(je); | |
2584 | } | |
2585 | } | |
2586 | ||
2587 | write_journal(ic, start_section, n_sections); | |
2588 | } | |
2589 | ||
2590 | static int find_commit_seq(struct dm_integrity_c *ic, unsigned i, unsigned j, commit_id_t id) | |
2591 | { | |
2592 | unsigned char k; | |
2593 | for (k = 0; k < N_COMMIT_IDS; k++) { | |
2594 | if (dm_integrity_commit_id(ic, i, j, k) == id) | |
2595 | return k; | |
2596 | } | |
2597 | dm_integrity_io_error(ic, "journal commit id", -EIO); | |
2598 | return -EIO; | |
2599 | } | |
2600 | ||
2601 | static void replay_journal(struct dm_integrity_c *ic) | |
2602 | { | |
2603 | unsigned i, j; | |
2604 | bool used_commit_ids[N_COMMIT_IDS]; | |
2605 | unsigned max_commit_id_sections[N_COMMIT_IDS]; | |
2606 | unsigned write_start, write_sections; | |
2607 | unsigned continue_section; | |
2608 | bool journal_empty; | |
2609 | unsigned char unused, last_used, want_commit_seq; | |
2610 | ||
c2bcb2b7 MP |
2611 | if (ic->mode == 'R') |
2612 | return; | |
2613 | ||
7eada909 MP |
2614 | if (ic->journal_uptodate) |
2615 | return; | |
2616 | ||
2617 | last_used = 0; | |
2618 | write_start = 0; | |
2619 | ||
2620 | if (!ic->just_formatted) { | |
2621 | DEBUG_print("reading journal\n"); | |
2622 | rw_journal(ic, REQ_OP_READ, 0, 0, ic->journal_sections, NULL); | |
2623 | if (ic->journal_io) | |
2624 | DEBUG_bytes(lowmem_page_address(ic->journal_io[0].page), 64, "read journal"); | |
2625 | if (ic->journal_io) { | |
2626 | struct journal_completion crypt_comp; | |
2627 | crypt_comp.ic = ic; | |
b5e8ad92 | 2628 | init_completion(&crypt_comp.comp); |
7eada909 MP |
2629 | crypt_comp.in_flight = (atomic_t)ATOMIC_INIT(0); |
2630 | encrypt_journal(ic, false, 0, ic->journal_sections, &crypt_comp); | |
2631 | wait_for_completion(&crypt_comp.comp); | |
2632 | } | |
2633 | DEBUG_bytes(lowmem_page_address(ic->journal[0].page), 64, "decrypted journal"); | |
2634 | } | |
2635 | ||
2636 | if (dm_integrity_failed(ic)) | |
2637 | goto clear_journal; | |
2638 | ||
2639 | journal_empty = true; | |
2640 | memset(used_commit_ids, 0, sizeof used_commit_ids); | |
2641 | memset(max_commit_id_sections, 0, sizeof max_commit_id_sections); | |
2642 | for (i = 0; i < ic->journal_sections; i++) { | |
2643 | for (j = 0; j < ic->journal_section_sectors; j++) { | |
2644 | int k; | |
2645 | struct journal_sector *js = access_journal(ic, i, j); | |
2646 | k = find_commit_seq(ic, i, j, js->commit_id); | |
2647 | if (k < 0) | |
2648 | goto clear_journal; | |
2649 | used_commit_ids[k] = true; | |
2650 | max_commit_id_sections[k] = i; | |
2651 | } | |
2652 | if (journal_empty) { | |
2653 | for (j = 0; j < ic->journal_section_entries; j++) { | |
2654 | struct journal_entry *je = access_journal_entry(ic, i, j); | |
2655 | if (!journal_entry_is_unused(je)) { | |
2656 | journal_empty = false; | |
2657 | break; | |
2658 | } | |
2659 | } | |
2660 | } | |
2661 | } | |
2662 | ||
2663 | if (!used_commit_ids[N_COMMIT_IDS - 1]) { | |
2664 | unused = N_COMMIT_IDS - 1; | |
2665 | while (unused && !used_commit_ids[unused - 1]) | |
2666 | unused--; | |
2667 | } else { | |
2668 | for (unused = 0; unused < N_COMMIT_IDS; unused++) | |
2669 | if (!used_commit_ids[unused]) | |
2670 | break; | |
2671 | if (unused == N_COMMIT_IDS) { | |
2672 | dm_integrity_io_error(ic, "journal commit ids", -EIO); | |
2673 | goto clear_journal; | |
2674 | } | |
2675 | } | |
2676 | DEBUG_print("first unused commit seq %d [%d,%d,%d,%d]\n", | |
2677 | unused, used_commit_ids[0], used_commit_ids[1], | |
2678 | used_commit_ids[2], used_commit_ids[3]); | |
2679 | ||
2680 | last_used = prev_commit_seq(unused); | |
2681 | want_commit_seq = prev_commit_seq(last_used); | |
2682 | ||
2683 | if (!used_commit_ids[want_commit_seq] && used_commit_ids[prev_commit_seq(want_commit_seq)]) | |
2684 | journal_empty = true; | |
2685 | ||
2686 | write_start = max_commit_id_sections[last_used] + 1; | |
2687 | if (unlikely(write_start >= ic->journal_sections)) | |
2688 | want_commit_seq = next_commit_seq(want_commit_seq); | |
2689 | wraparound_section(ic, &write_start); | |
2690 | ||
2691 | i = write_start; | |
2692 | for (write_sections = 0; write_sections < ic->journal_sections; write_sections++) { | |
2693 | for (j = 0; j < ic->journal_section_sectors; j++) { | |
2694 | struct journal_sector *js = access_journal(ic, i, j); | |
2695 | ||
2696 | if (js->commit_id != dm_integrity_commit_id(ic, i, j, want_commit_seq)) { | |
2697 | /* | |
2698 | * This could be caused by crash during writing. | |
2699 | * We won't replay the inconsistent part of the | |
2700 | * journal. | |
2701 | */ | |
2702 | DEBUG_print("commit id mismatch at position (%u, %u): %d != %d\n", | |
2703 | i, j, find_commit_seq(ic, i, j, js->commit_id), want_commit_seq); | |
2704 | goto brk; | |
2705 | } | |
2706 | } | |
2707 | i++; | |
2708 | if (unlikely(i >= ic->journal_sections)) | |
2709 | want_commit_seq = next_commit_seq(want_commit_seq); | |
2710 | wraparound_section(ic, &i); | |
2711 | } | |
2712 | brk: | |
2713 | ||
2714 | if (!journal_empty) { | |
2715 | DEBUG_print("replaying %u sections, starting at %u, commit seq %d\n", | |
2716 | write_sections, write_start, want_commit_seq); | |
2717 | do_journal_write(ic, write_start, write_sections, true); | |
2718 | } | |
2719 | ||
2720 | if (write_sections == ic->journal_sections && (ic->mode == 'J' || journal_empty)) { | |
2721 | continue_section = write_start; | |
2722 | ic->commit_seq = want_commit_seq; | |
2723 | DEBUG_print("continuing from section %u, commit seq %d\n", write_start, ic->commit_seq); | |
2724 | } else { | |
2725 | unsigned s; | |
2726 | unsigned char erase_seq; | |
2727 | clear_journal: | |
2728 | DEBUG_print("clearing journal\n"); | |
2729 | ||
2730 | erase_seq = prev_commit_seq(prev_commit_seq(last_used)); | |
2731 | s = write_start; | |
2732 | init_journal(ic, s, 1, erase_seq); | |
2733 | s++; | |
2734 | wraparound_section(ic, &s); | |
2735 | if (ic->journal_sections >= 2) { | |
2736 | init_journal(ic, s, ic->journal_sections - 2, erase_seq); | |
2737 | s += ic->journal_sections - 2; | |
2738 | wraparound_section(ic, &s); | |
2739 | init_journal(ic, s, 1, erase_seq); | |
2740 | } | |
2741 | ||
2742 | continue_section = 0; | |
2743 | ic->commit_seq = next_commit_seq(erase_seq); | |
2744 | } | |
2745 | ||
2746 | ic->committed_section = continue_section; | |
2747 | ic->n_committed_sections = 0; | |
2748 | ||
2749 | ic->uncommitted_section = continue_section; | |
2750 | ic->n_uncommitted_sections = 0; | |
2751 | ||
2752 | ic->free_section = continue_section; | |
2753 | ic->free_section_entry = 0; | |
2754 | ic->free_sectors = ic->journal_entries; | |
2755 | ||
2756 | ic->journal_tree_root = RB_ROOT; | |
2757 | for (i = 0; i < ic->journal_entries; i++) | |
2758 | init_journal_node(&ic->journal_tree[i]); | |
2759 | } | |
2760 | ||
48271493 | 2761 | static void dm_integrity_enter_synchronous_mode(struct dm_integrity_c *ic) |
1f5a7759 | 2762 | { |
48271493 | 2763 | DEBUG_print("dm_integrity_enter_synchronous_mode\n"); |
1f5a7759 MP |
2764 | |
2765 | if (ic->mode == 'B') { | |
48271493 MP |
2766 | ic->bitmap_flush_interval = msecs_to_jiffies(10) + 1; |
2767 | ic->synchronous_mode = 1; | |
2768 | ||
1f5a7759 MP |
2769 | cancel_delayed_work_sync(&ic->bitmap_flush_work); |
2770 | queue_delayed_work(ic->commit_wq, &ic->bitmap_flush_work, 0); | |
2771 | flush_workqueue(ic->commit_wq); | |
2772 | } | |
48271493 MP |
2773 | } |
2774 | ||
2775 | static int dm_integrity_reboot(struct notifier_block *n, unsigned long code, void *x) | |
2776 | { | |
2777 | struct dm_integrity_c *ic = container_of(n, struct dm_integrity_c, reboot_notifier); | |
2778 | ||
2779 | DEBUG_print("dm_integrity_reboot\n"); | |
2780 | ||
2781 | dm_integrity_enter_synchronous_mode(ic); | |
1f5a7759 MP |
2782 | |
2783 | return NOTIFY_DONE; | |
2784 | } | |
2785 | ||
7eada909 MP |
2786 | static void dm_integrity_postsuspend(struct dm_target *ti) |
2787 | { | |
2788 | struct dm_integrity_c *ic = (struct dm_integrity_c *)ti->private; | |
468dfca3 | 2789 | int r; |
7eada909 | 2790 | |
1f5a7759 | 2791 | WARN_ON(unregister_reboot_notifier(&ic->reboot_notifier)); |
7eada909 MP |
2792 | |
2793 | del_timer_sync(&ic->autocommit_timer); | |
2794 | ||
a3fcf725 MP |
2795 | if (ic->recalc_wq) |
2796 | drain_workqueue(ic->recalc_wq); | |
2797 | ||
468dfca3 MP |
2798 | if (ic->mode == 'B') |
2799 | cancel_delayed_work_sync(&ic->bitmap_flush_work); | |
2800 | ||
7eada909 MP |
2801 | queue_work(ic->commit_wq, &ic->commit_work); |
2802 | drain_workqueue(ic->commit_wq); | |
2803 | ||
2804 | if (ic->mode == 'J') { | |
747829a8 MP |
2805 | if (ic->meta_dev) |
2806 | queue_work(ic->writer_wq, &ic->writer_work); | |
7eada909 MP |
2807 | drain_workqueue(ic->writer_wq); |
2808 | dm_integrity_flush_buffers(ic); | |
2809 | } | |
2810 | ||
468dfca3 MP |
2811 | if (ic->mode == 'B') { |
2812 | dm_integrity_flush_buffers(ic); | |
2813 | #if 1 | |
05d6909e | 2814 | /* set to 0 to test bitmap replay code */ |
468dfca3 MP |
2815 | init_journal(ic, 0, ic->journal_sections, 0); |
2816 | ic->sb->flags &= ~cpu_to_le32(SB_FLAG_DIRTY_BITMAP); | |
2817 | r = sync_rw_sb(ic, REQ_OP_WRITE, REQ_FUA); | |
2818 | if (unlikely(r)) | |
2819 | dm_integrity_io_error(ic, "writing superblock", r); | |
2820 | #endif | |
2821 | } | |
2822 | ||
7eada909 MP |
2823 | BUG_ON(!RB_EMPTY_ROOT(&ic->in_progress)); |
2824 | ||
2825 | ic->journal_uptodate = true; | |
2826 | } | |
2827 | ||
2828 | static void dm_integrity_resume(struct dm_target *ti) | |
2829 | { | |
2830 | struct dm_integrity_c *ic = (struct dm_integrity_c *)ti->private; | |
468dfca3 MP |
2831 | int r; |
2832 | DEBUG_print("resume\n"); | |
2833 | ||
2834 | if (ic->sb->flags & cpu_to_le32(SB_FLAG_DIRTY_BITMAP)) { | |
2835 | DEBUG_print("resume dirty_bitmap\n"); | |
05d6909e MS |
2836 | rw_journal_sectors(ic, REQ_OP_READ, 0, 0, |
2837 | ic->n_bitmap_blocks * (BITMAP_BLOCK_SIZE >> SECTOR_SHIFT), NULL); | |
468dfca3 MP |
2838 | if (ic->mode == 'B') { |
2839 | if (ic->sb->log2_blocks_per_bitmap_bit == ic->log2_blocks_per_bitmap_bit) { | |
2840 | block_bitmap_copy(ic, ic->recalc_bitmap, ic->journal); | |
2841 | block_bitmap_copy(ic, ic->may_write_bitmap, ic->journal); | |
05d6909e MS |
2842 | if (!block_bitmap_op(ic, ic->journal, 0, ic->provided_data_sectors, |
2843 | BITMAP_OP_TEST_ALL_CLEAR)) { | |
468dfca3 MP |
2844 | ic->sb->flags |= cpu_to_le32(SB_FLAG_RECALCULATING); |
2845 | ic->sb->recalc_sector = cpu_to_le64(0); | |
2846 | } | |
2847 | } else { | |
05d6909e MS |
2848 | DEBUG_print("non-matching blocks_per_bitmap_bit: %u, %u\n", |
2849 | ic->sb->log2_blocks_per_bitmap_bit, ic->log2_blocks_per_bitmap_bit); | |
468dfca3 MP |
2850 | ic->sb->log2_blocks_per_bitmap_bit = ic->log2_blocks_per_bitmap_bit; |
2851 | block_bitmap_op(ic, ic->recalc_bitmap, 0, ic->provided_data_sectors, BITMAP_OP_SET); | |
2852 | block_bitmap_op(ic, ic->may_write_bitmap, 0, ic->provided_data_sectors, BITMAP_OP_SET); | |
2853 | block_bitmap_op(ic, ic->journal, 0, ic->provided_data_sectors, BITMAP_OP_SET); | |
05d6909e MS |
2854 | rw_journal_sectors(ic, REQ_OP_WRITE, REQ_FUA | REQ_SYNC, 0, |
2855 | ic->n_bitmap_blocks * (BITMAP_BLOCK_SIZE >> SECTOR_SHIFT), NULL); | |
468dfca3 MP |
2856 | ic->sb->flags |= cpu_to_le32(SB_FLAG_RECALCULATING); |
2857 | ic->sb->recalc_sector = cpu_to_le64(0); | |
2858 | } | |
2859 | } else { | |
2860 | if (!(ic->sb->log2_blocks_per_bitmap_bit == ic->log2_blocks_per_bitmap_bit && | |
2861 | block_bitmap_op(ic, ic->journal, 0, ic->provided_data_sectors, BITMAP_OP_TEST_ALL_CLEAR))) { | |
2862 | ic->sb->flags |= cpu_to_le32(SB_FLAG_RECALCULATING); | |
2863 | ic->sb->recalc_sector = cpu_to_le64(0); | |
2864 | } | |
2865 | init_journal(ic, 0, ic->journal_sections, 0); | |
2866 | replay_journal(ic); | |
2867 | ic->sb->flags &= ~cpu_to_le32(SB_FLAG_DIRTY_BITMAP); | |
2868 | } | |
2869 | r = sync_rw_sb(ic, REQ_OP_WRITE, REQ_FUA); | |
2870 | if (unlikely(r)) | |
2871 | dm_integrity_io_error(ic, "writing superblock", r); | |
2872 | } else { | |
2873 | replay_journal(ic); | |
2874 | if (ic->mode == 'B') { | |
468dfca3 MP |
2875 | ic->sb->flags |= cpu_to_le32(SB_FLAG_DIRTY_BITMAP); |
2876 | ic->sb->log2_blocks_per_bitmap_bit = ic->log2_blocks_per_bitmap_bit; | |
2877 | r = sync_rw_sb(ic, REQ_OP_WRITE, REQ_FUA); | |
2878 | if (unlikely(r)) | |
2879 | dm_integrity_io_error(ic, "writing superblock", r); | |
7eada909 | 2880 | |
d5bdf661 MP |
2881 | block_bitmap_op(ic, ic->journal, 0, ic->provided_data_sectors, BITMAP_OP_CLEAR); |
2882 | block_bitmap_op(ic, ic->recalc_bitmap, 0, ic->provided_data_sectors, BITMAP_OP_CLEAR); | |
2883 | block_bitmap_op(ic, ic->may_write_bitmap, 0, ic->provided_data_sectors, BITMAP_OP_CLEAR); | |
2884 | if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING) && | |
2885 | le64_to_cpu(ic->sb->recalc_sector) < ic->provided_data_sectors) { | |
2886 | block_bitmap_op(ic, ic->journal, le64_to_cpu(ic->sb->recalc_sector), | |
2887 | ic->provided_data_sectors - le64_to_cpu(ic->sb->recalc_sector), BITMAP_OP_SET); | |
2888 | block_bitmap_op(ic, ic->recalc_bitmap, le64_to_cpu(ic->sb->recalc_sector), | |
2889 | ic->provided_data_sectors - le64_to_cpu(ic->sb->recalc_sector), BITMAP_OP_SET); | |
2890 | block_bitmap_op(ic, ic->may_write_bitmap, le64_to_cpu(ic->sb->recalc_sector), | |
2891 | ic->provided_data_sectors - le64_to_cpu(ic->sb->recalc_sector), BITMAP_OP_SET); | |
2892 | } | |
05d6909e MS |
2893 | rw_journal_sectors(ic, REQ_OP_WRITE, REQ_FUA | REQ_SYNC, 0, |
2894 | ic->n_bitmap_blocks * (BITMAP_BLOCK_SIZE >> SECTOR_SHIFT), NULL); | |
468dfca3 MP |
2895 | } |
2896 | } | |
7eada909 | 2897 | |
468dfca3 MP |
2898 | DEBUG_print("testing recalc: %x\n", ic->sb->flags); |
2899 | if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) { | |
a3fcf725 | 2900 | __u64 recalc_pos = le64_to_cpu(ic->sb->recalc_sector); |
468dfca3 | 2901 | DEBUG_print("recalc pos: %lx / %lx\n", (long)recalc_pos, ic->provided_data_sectors); |
a3fcf725 MP |
2902 | if (recalc_pos < ic->provided_data_sectors) { |
2903 | queue_work(ic->recalc_wq, &ic->recalc_work); | |
2904 | } else if (recalc_pos > ic->provided_data_sectors) { | |
2905 | ic->sb->recalc_sector = cpu_to_le64(ic->provided_data_sectors); | |
2906 | recalc_write_super(ic); | |
2907 | } | |
2908 | } | |
1f5a7759 MP |
2909 | |
2910 | ic->reboot_notifier.notifier_call = dm_integrity_reboot; | |
2911 | ic->reboot_notifier.next = NULL; | |
2912 | ic->reboot_notifier.priority = INT_MAX - 1; /* be notified after md and before hardware drivers */ | |
2913 | WARN_ON(register_reboot_notifier(&ic->reboot_notifier)); | |
48271493 MP |
2914 | |
2915 | #if 0 | |
05d6909e | 2916 | /* set to 1 to stress test synchronous mode */ |
48271493 MP |
2917 | dm_integrity_enter_synchronous_mode(ic); |
2918 | #endif | |
7eada909 MP |
2919 | } |
2920 | ||
2921 | static void dm_integrity_status(struct dm_target *ti, status_type_t type, | |
2922 | unsigned status_flags, char *result, unsigned maxlen) | |
2923 | { | |
2924 | struct dm_integrity_c *ic = (struct dm_integrity_c *)ti->private; | |
2925 | unsigned arg_count; | |
2926 | size_t sz = 0; | |
2927 | ||
2928 | switch (type) { | |
2929 | case STATUSTYPE_INFO: | |
f84fd2c9 MP |
2930 | DMEMIT("%llu %llu", |
2931 | (unsigned long long)atomic64_read(&ic->number_of_mismatches), | |
2932 | (unsigned long long)ic->provided_data_sectors); | |
a3fcf725 MP |
2933 | if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) |
2934 | DMEMIT(" %llu", (unsigned long long)le64_to_cpu(ic->sb->recalc_sector)); | |
2935 | else | |
2936 | DMEMIT(" -"); | |
7eada909 MP |
2937 | break; |
2938 | ||
2939 | case STATUSTYPE_TABLE: { | |
2940 | __u64 watermark_percentage = (__u64)(ic->journal_entries - ic->free_sectors_threshold) * 100; | |
2941 | watermark_percentage += ic->journal_entries / 2; | |
2942 | do_div(watermark_percentage, ic->journal_entries); | |
893e3c39 | 2943 | arg_count = 3; |
356d9d52 | 2944 | arg_count += !!ic->meta_dev; |
9d609f85 | 2945 | arg_count += ic->sectors_per_block != 1; |
a3fcf725 | 2946 | arg_count += !!(ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)); |
893e3c39 MP |
2947 | arg_count += ic->mode == 'J'; |
2948 | arg_count += ic->mode == 'J'; | |
468dfca3 MP |
2949 | arg_count += ic->mode == 'B'; |
2950 | arg_count += ic->mode == 'B'; | |
7eada909 MP |
2951 | arg_count += !!ic->internal_hash_alg.alg_string; |
2952 | arg_count += !!ic->journal_crypt_alg.alg_string; | |
2953 | arg_count += !!ic->journal_mac_alg.alg_string; | |
d537858a | 2954 | arg_count += (ic->sb->flags & cpu_to_le32(SB_FLAG_FIXED_PADDING)) != 0; |
7eada909 MP |
2955 | DMEMIT("%s %llu %u %c %u", ic->dev->name, (unsigned long long)ic->start, |
2956 | ic->tag_size, ic->mode, arg_count); | |
356d9d52 MP |
2957 | if (ic->meta_dev) |
2958 | DMEMIT(" meta_device:%s", ic->meta_dev->name); | |
a3fcf725 MP |
2959 | if (ic->sectors_per_block != 1) |
2960 | DMEMIT(" block_size:%u", ic->sectors_per_block << SECTOR_SHIFT); | |
7fc2e47f | 2961 | if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) |
a3fcf725 | 2962 | DMEMIT(" recalculate"); |
56b67a4f MP |
2963 | DMEMIT(" journal_sectors:%u", ic->initial_sectors - SB_SECTORS); |
2964 | DMEMIT(" interleave_sectors:%u", 1U << ic->sb->log2_interleave_sectors); | |
2965 | DMEMIT(" buffer_sectors:%u", 1U << ic->log2_buffer_sectors); | |
893e3c39 MP |
2966 | if (ic->mode == 'J') { |
2967 | DMEMIT(" journal_watermark:%u", (unsigned)watermark_percentage); | |
2968 | DMEMIT(" commit_time:%u", ic->autocommit_msec); | |
2969 | } | |
468dfca3 MP |
2970 | if (ic->mode == 'B') { |
2971 | DMEMIT(" sectors_per_bit:%llu", (unsigned long long)ic->sectors_per_block << ic->log2_blocks_per_bitmap_bit); | |
2972 | DMEMIT(" bitmap_flush_interval:%u", jiffies_to_msecs(ic->bitmap_flush_interval)); | |
2973 | } | |
d537858a MP |
2974 | if ((ic->sb->flags & cpu_to_le32(SB_FLAG_FIXED_PADDING)) != 0) |
2975 | DMEMIT(" fix_padding"); | |
7eada909 MP |
2976 | |
2977 | #define EMIT_ALG(a, n) \ | |
2978 | do { \ | |
2979 | if (ic->a.alg_string) { \ | |
2980 | DMEMIT(" %s:%s", n, ic->a.alg_string); \ | |
2981 | if (ic->a.key_string) \ | |
2982 | DMEMIT(":%s", ic->a.key_string);\ | |
2983 | } \ | |
2984 | } while (0) | |
56b67a4f MP |
2985 | EMIT_ALG(internal_hash_alg, "internal_hash"); |
2986 | EMIT_ALG(journal_crypt_alg, "journal_crypt"); | |
2987 | EMIT_ALG(journal_mac_alg, "journal_mac"); | |
7eada909 MP |
2988 | break; |
2989 | } | |
2990 | } | |
2991 | } | |
2992 | ||
2993 | static int dm_integrity_iterate_devices(struct dm_target *ti, | |
2994 | iterate_devices_callout_fn fn, void *data) | |
2995 | { | |
2996 | struct dm_integrity_c *ic = ti->private; | |
2997 | ||
356d9d52 MP |
2998 | if (!ic->meta_dev) |
2999 | return fn(ti, ic->dev, ic->start + ic->initial_sectors + ic->metadata_run, ti->len, data); | |
3000 | else | |
3001 | return fn(ti, ic->dev, 0, ti->len, data); | |
7eada909 MP |
3002 | } |
3003 | ||
9d609f85 MP |
3004 | static void dm_integrity_io_hints(struct dm_target *ti, struct queue_limits *limits) |
3005 | { | |
3006 | struct dm_integrity_c *ic = ti->private; | |
3007 | ||
3008 | if (ic->sectors_per_block > 1) { | |
3009 | limits->logical_block_size = ic->sectors_per_block << SECTOR_SHIFT; | |
3010 | limits->physical_block_size = ic->sectors_per_block << SECTOR_SHIFT; | |
3011 | blk_limits_io_min(limits, ic->sectors_per_block << SECTOR_SHIFT); | |
3012 | } | |
3013 | } | |
3014 | ||
7eada909 MP |
3015 | static void calculate_journal_section_size(struct dm_integrity_c *ic) |
3016 | { | |
3017 | unsigned sector_space = JOURNAL_SECTOR_DATA; | |
3018 | ||
3019 | ic->journal_sections = le32_to_cpu(ic->sb->journal_sections); | |
9d609f85 | 3020 | ic->journal_entry_size = roundup(offsetof(struct journal_entry, last_bytes[ic->sectors_per_block]) + ic->tag_size, |
7eada909 MP |
3021 | JOURNAL_ENTRY_ROUNDUP); |
3022 | ||
3023 | if (ic->sb->flags & cpu_to_le32(SB_FLAG_HAVE_JOURNAL_MAC)) | |
3024 | sector_space -= JOURNAL_MAC_PER_SECTOR; | |
3025 | ic->journal_entries_per_sector = sector_space / ic->journal_entry_size; | |
3026 | ic->journal_section_entries = ic->journal_entries_per_sector * JOURNAL_BLOCK_SECTORS; | |
9d609f85 | 3027 | ic->journal_section_sectors = (ic->journal_section_entries << ic->sb->log2_sectors_per_block) + JOURNAL_BLOCK_SECTORS; |
7eada909 MP |
3028 | ic->journal_entries = ic->journal_section_entries * ic->journal_sections; |
3029 | } | |
3030 | ||
3031 | static int calculate_device_limits(struct dm_integrity_c *ic) | |
3032 | { | |
3033 | __u64 initial_sectors; | |
7eada909 MP |
3034 | |
3035 | calculate_journal_section_size(ic); | |
3036 | initial_sectors = SB_SECTORS + (__u64)ic->journal_section_sectors * ic->journal_sections; | |
356d9d52 | 3037 | if (initial_sectors + METADATA_PADDING_SECTORS >= ic->meta_device_sectors || initial_sectors > UINT_MAX) |
7eada909 MP |
3038 | return -EINVAL; |
3039 | ic->initial_sectors = initial_sectors; | |
3040 | ||
356d9d52 MP |
3041 | if (!ic->meta_dev) { |
3042 | sector_t last_sector, last_area, last_offset; | |
7eada909 | 3043 | |
d537858a MP |
3044 | /* we have to maintain excessive padding for compatibility with existing volumes */ |
3045 | __u64 metadata_run_padding = | |
3046 | ic->sb->flags & cpu_to_le32(SB_FLAG_FIXED_PADDING) ? | |
3047 | (__u64)(METADATA_PADDING_SECTORS << SECTOR_SHIFT) : | |
3048 | (__u64)(1 << SECTOR_SHIFT << METADATA_PADDING_SECTORS); | |
3049 | ||
3050 | ic->metadata_run = round_up((__u64)ic->tag_size << (ic->sb->log2_interleave_sectors - ic->sb->log2_sectors_per_block), | |
3051 | metadata_run_padding) >> SECTOR_SHIFT; | |
356d9d52 MP |
3052 | if (!(ic->metadata_run & (ic->metadata_run - 1))) |
3053 | ic->log2_metadata_run = __ffs(ic->metadata_run); | |
3054 | else | |
3055 | ic->log2_metadata_run = -1; | |
7eada909 | 3056 | |
356d9d52 MP |
3057 | get_area_and_offset(ic, ic->provided_data_sectors - 1, &last_area, &last_offset); |
3058 | last_sector = get_data_sector(ic, last_area, last_offset); | |
3059 | if (last_sector < ic->start || last_sector >= ic->meta_device_sectors) | |
3060 | return -EINVAL; | |
3061 | } else { | |
30bba430 | 3062 | __u64 meta_size = (ic->provided_data_sectors >> ic->sb->log2_sectors_per_block) * ic->tag_size; |
356d9d52 MP |
3063 | meta_size = (meta_size + ((1U << (ic->log2_buffer_sectors + SECTOR_SHIFT)) - 1)) |
3064 | >> (ic->log2_buffer_sectors + SECTOR_SHIFT); | |
3065 | meta_size <<= ic->log2_buffer_sectors; | |
3066 | if (ic->initial_sectors + meta_size < ic->initial_sectors || | |
3067 | ic->initial_sectors + meta_size > ic->meta_device_sectors) | |
3068 | return -EINVAL; | |
3069 | ic->metadata_run = 1; | |
3070 | ic->log2_metadata_run = 0; | |
3071 | } | |
7eada909 MP |
3072 | |
3073 | return 0; | |
3074 | } | |
3075 | ||
3076 | static int initialize_superblock(struct dm_integrity_c *ic, unsigned journal_sectors, unsigned interleave_sectors) | |
3077 | { | |
3078 | unsigned journal_sections; | |
3079 | int test_bit; | |
3080 | ||
56b67a4f | 3081 | memset(ic->sb, 0, SB_SECTORS << SECTOR_SHIFT); |
7eada909 | 3082 | memcpy(ic->sb->magic, SB_MAGIC, 8); |
7eada909 | 3083 | ic->sb->integrity_tag_size = cpu_to_le16(ic->tag_size); |
9d609f85 | 3084 | ic->sb->log2_sectors_per_block = __ffs(ic->sectors_per_block); |
7eada909 MP |
3085 | if (ic->journal_mac_alg.alg_string) |
3086 | ic->sb->flags |= cpu_to_le32(SB_FLAG_HAVE_JOURNAL_MAC); | |
3087 | ||
3088 | calculate_journal_section_size(ic); | |
3089 | journal_sections = journal_sectors / ic->journal_section_sectors; | |
3090 | if (!journal_sections) | |
3091 | journal_sections = 1; | |
7eada909 | 3092 | |
356d9d52 | 3093 | if (!ic->meta_dev) { |
d537858a MP |
3094 | if (ic->fix_padding) |
3095 | ic->sb->flags |= cpu_to_le32(SB_FLAG_FIXED_PADDING); | |
356d9d52 MP |
3096 | ic->sb->journal_sections = cpu_to_le32(journal_sections); |
3097 | if (!interleave_sectors) | |
3098 | interleave_sectors = DEFAULT_INTERLEAVE_SECTORS; | |
3099 | ic->sb->log2_interleave_sectors = __fls(interleave_sectors); | |
3100 | ic->sb->log2_interleave_sectors = max((__u8)MIN_LOG2_INTERLEAVE_SECTORS, ic->sb->log2_interleave_sectors); | |
3101 | ic->sb->log2_interleave_sectors = min((__u8)MAX_LOG2_INTERLEAVE_SECTORS, ic->sb->log2_interleave_sectors); | |
3102 | ||
3103 | ic->provided_data_sectors = 0; | |
3104 | for (test_bit = fls64(ic->meta_device_sectors) - 1; test_bit >= 3; test_bit--) { | |
3105 | __u64 prev_data_sectors = ic->provided_data_sectors; | |
3106 | ||
3107 | ic->provided_data_sectors |= (sector_t)1 << test_bit; | |
3108 | if (calculate_device_limits(ic)) | |
3109 | ic->provided_data_sectors = prev_data_sectors; | |
3110 | } | |
3111 | if (!ic->provided_data_sectors) | |
3112 | return -EINVAL; | |
3113 | } else { | |
3114 | ic->sb->log2_interleave_sectors = 0; | |
3115 | ic->provided_data_sectors = ic->data_device_sectors; | |
3116 | ic->provided_data_sectors &= ~(sector_t)(ic->sectors_per_block - 1); | |
3117 | ||
3118 | try_smaller_buffer: | |
3119 | ic->sb->journal_sections = cpu_to_le32(0); | |
3120 | for (test_bit = fls(journal_sections) - 1; test_bit >= 0; test_bit--) { | |
3121 | __u32 prev_journal_sections = le32_to_cpu(ic->sb->journal_sections); | |
3122 | __u32 test_journal_sections = prev_journal_sections | (1U << test_bit); | |
3123 | if (test_journal_sections > journal_sections) | |
3124 | continue; | |
3125 | ic->sb->journal_sections = cpu_to_le32(test_journal_sections); | |
3126 | if (calculate_device_limits(ic)) | |
3127 | ic->sb->journal_sections = cpu_to_le32(prev_journal_sections); | |
7eada909 | 3128 | |
356d9d52 MP |
3129 | } |
3130 | if (!le32_to_cpu(ic->sb->journal_sections)) { | |
3131 | if (ic->log2_buffer_sectors > 3) { | |
3132 | ic->log2_buffer_sectors--; | |
3133 | goto try_smaller_buffer; | |
3134 | } | |
3135 | return -EINVAL; | |
3136 | } | |
7eada909 MP |
3137 | } |
3138 | ||
7eada909 MP |
3139 | ic->sb->provided_data_sectors = cpu_to_le64(ic->provided_data_sectors); |
3140 | ||
1f9fc0b8 MP |
3141 | sb_set_version(ic); |
3142 | ||
7eada909 MP |
3143 | return 0; |
3144 | } | |
3145 | ||
3146 | static void dm_integrity_set(struct dm_target *ti, struct dm_integrity_c *ic) | |
3147 | { | |
3148 | struct gendisk *disk = dm_disk(dm_table_get_md(ti->table)); | |
3149 | struct blk_integrity bi; | |
3150 | ||
3151 | memset(&bi, 0, sizeof(bi)); | |
3152 | bi.profile = &dm_integrity_profile; | |
9d609f85 MP |
3153 | bi.tuple_size = ic->tag_size; |
3154 | bi.tag_size = bi.tuple_size; | |
84ff1bcc | 3155 | bi.interval_exp = ic->sb->log2_sectors_per_block + SECTOR_SHIFT; |
7eada909 MP |
3156 | |
3157 | blk_integrity_register(disk, &bi); | |
3158 | blk_queue_max_integrity_segments(disk->queue, UINT_MAX); | |
3159 | } | |
3160 | ||
d5027e03 | 3161 | static void dm_integrity_free_page_list(struct page_list *pl) |
7eada909 MP |
3162 | { |
3163 | unsigned i; | |
3164 | ||
3165 | if (!pl) | |
3166 | return; | |
d5027e03 MP |
3167 | for (i = 0; pl[i].page; i++) |
3168 | __free_page(pl[i].page); | |
7eada909 MP |
3169 | kvfree(pl); |
3170 | } | |
3171 | ||
d5027e03 | 3172 | static struct page_list *dm_integrity_alloc_page_list(unsigned n_pages) |
7eada909 | 3173 | { |
7eada909 MP |
3174 | struct page_list *pl; |
3175 | unsigned i; | |
3176 | ||
d5027e03 | 3177 | pl = kvmalloc_array(n_pages + 1, sizeof(struct page_list), GFP_KERNEL | __GFP_ZERO); |
7eada909 MP |
3178 | if (!pl) |
3179 | return NULL; | |
3180 | ||
d5027e03 | 3181 | for (i = 0; i < n_pages; i++) { |
7eada909 MP |
3182 | pl[i].page = alloc_page(GFP_KERNEL); |
3183 | if (!pl[i].page) { | |
d5027e03 | 3184 | dm_integrity_free_page_list(pl); |
7eada909 MP |
3185 | return NULL; |
3186 | } | |
3187 | if (i) | |
3188 | pl[i - 1].next = &pl[i]; | |
3189 | } | |
d5027e03 MP |
3190 | pl[i].page = NULL; |
3191 | pl[i].next = NULL; | |
7eada909 MP |
3192 | |
3193 | return pl; | |
3194 | } | |
3195 | ||
3196 | static void dm_integrity_free_journal_scatterlist(struct dm_integrity_c *ic, struct scatterlist **sl) | |
3197 | { | |
3198 | unsigned i; | |
3199 | for (i = 0; i < ic->journal_sections; i++) | |
3200 | kvfree(sl[i]); | |
fc8cec11 | 3201 | kvfree(sl); |
7eada909 MP |
3202 | } |
3203 | ||
05d6909e MS |
3204 | static struct scatterlist **dm_integrity_alloc_journal_scatterlist(struct dm_integrity_c *ic, |
3205 | struct page_list *pl) | |
7eada909 MP |
3206 | { |
3207 | struct scatterlist **sl; | |
3208 | unsigned i; | |
3209 | ||
344476e1 KC |
3210 | sl = kvmalloc_array(ic->journal_sections, |
3211 | sizeof(struct scatterlist *), | |
3212 | GFP_KERNEL | __GFP_ZERO); | |
7eada909 MP |
3213 | if (!sl) |
3214 | return NULL; | |
3215 | ||
3216 | for (i = 0; i < ic->journal_sections; i++) { | |
3217 | struct scatterlist *s; | |
3218 | unsigned start_index, start_offset; | |
3219 | unsigned end_index, end_offset; | |
3220 | unsigned n_pages; | |
3221 | unsigned idx; | |
3222 | ||
3223 | page_list_location(ic, i, 0, &start_index, &start_offset); | |
05d6909e MS |
3224 | page_list_location(ic, i, ic->journal_section_sectors - 1, |
3225 | &end_index, &end_offset); | |
7eada909 MP |
3226 | |
3227 | n_pages = (end_index - start_index + 1); | |
3228 | ||
344476e1 KC |
3229 | s = kvmalloc_array(n_pages, sizeof(struct scatterlist), |
3230 | GFP_KERNEL); | |
7eada909 MP |
3231 | if (!s) { |
3232 | dm_integrity_free_journal_scatterlist(ic, sl); | |
3233 | return NULL; | |
3234 | } | |
3235 | ||
3236 | sg_init_table(s, n_pages); | |
3237 | for (idx = start_index; idx <= end_index; idx++) { | |
3238 | char *va = lowmem_page_address(pl[idx].page); | |
3239 | unsigned start = 0, end = PAGE_SIZE; | |
3240 | if (idx == start_index) | |
3241 | start = start_offset; | |
3242 | if (idx == end_index) | |
3243 | end = end_offset + (1 << SECTOR_SHIFT); | |
3244 | sg_set_buf(&s[idx - start_index], va + start, end - start); | |
3245 | } | |
3246 | ||
3247 | sl[i] = s; | |
3248 | } | |
3249 | ||
3250 | return sl; | |
3251 | } | |
3252 | ||
3253 | static void free_alg(struct alg_spec *a) | |
3254 | { | |
3255 | kzfree(a->alg_string); | |
3256 | kzfree(a->key); | |
3257 | memset(a, 0, sizeof *a); | |
3258 | } | |
3259 | ||
3260 | static int get_alg_and_key(const char *arg, struct alg_spec *a, char **error, char *error_inval) | |
3261 | { | |
3262 | char *k; | |
3263 | ||
3264 | free_alg(a); | |
3265 | ||
3266 | a->alg_string = kstrdup(strchr(arg, ':') + 1, GFP_KERNEL); | |
3267 | if (!a->alg_string) | |
3268 | goto nomem; | |
3269 | ||
3270 | k = strchr(a->alg_string, ':'); | |
3271 | if (k) { | |
7eada909 MP |
3272 | *k = 0; |
3273 | a->key_string = k + 1; | |
3274 | if (strlen(a->key_string) & 1) | |
3275 | goto inval; | |
3276 | ||
3277 | a->key_size = strlen(a->key_string) / 2; | |
3278 | a->key = kmalloc(a->key_size, GFP_KERNEL); | |
3279 | if (!a->key) | |
3280 | goto nomem; | |
6625d903 MP |
3281 | if (hex2bin(a->key, a->key_string, a->key_size)) |
3282 | goto inval; | |
7eada909 MP |
3283 | } |
3284 | ||
3285 | return 0; | |
3286 | inval: | |
3287 | *error = error_inval; | |
3288 | return -EINVAL; | |
3289 | nomem: | |
3290 | *error = "Out of memory for an argument"; | |
3291 | return -ENOMEM; | |
3292 | } | |
3293 | ||
3294 | static int get_mac(struct crypto_shash **hash, struct alg_spec *a, char **error, | |
3295 | char *error_alg, char *error_key) | |
3296 | { | |
3297 | int r; | |
3298 | ||
3299 | if (a->alg_string) { | |
3d234b33 | 3300 | *hash = crypto_alloc_shash(a->alg_string, 0, 0); |
7eada909 MP |
3301 | if (IS_ERR(*hash)) { |
3302 | *error = error_alg; | |
3303 | r = PTR_ERR(*hash); | |
3304 | *hash = NULL; | |
3305 | return r; | |
3306 | } | |
3307 | ||
3308 | if (a->key) { | |
3309 | r = crypto_shash_setkey(*hash, a->key, a->key_size); | |
3310 | if (r) { | |
3311 | *error = error_key; | |
3312 | return r; | |
3313 | } | |
e16b4f99 MB |
3314 | } else if (crypto_shash_get_flags(*hash) & CRYPTO_TFM_NEED_KEY) { |
3315 | *error = error_key; | |
3316 | return -ENOKEY; | |
7eada909 MP |
3317 | } |
3318 | } | |
3319 | ||
3320 | return 0; | |
3321 | } | |
3322 | ||
1aa0efd4 MS |
3323 | static int create_journal(struct dm_integrity_c *ic, char **error) |
3324 | { | |
3325 | int r = 0; | |
3326 | unsigned i; | |
3327 | __u64 journal_pages, journal_desc_size, journal_tree_size; | |
717f4b1c MP |
3328 | unsigned char *crypt_data = NULL, *crypt_iv = NULL; |
3329 | struct skcipher_request *req = NULL; | |
56b67a4f MP |
3330 | |
3331 | ic->commit_ids[0] = cpu_to_le64(0x1111111111111111ULL); | |
3332 | ic->commit_ids[1] = cpu_to_le64(0x2222222222222222ULL); | |
3333 | ic->commit_ids[2] = cpu_to_le64(0x3333333333333333ULL); | |
3334 | ic->commit_ids[3] = cpu_to_le64(0x4444444444444444ULL); | |
1aa0efd4 MS |
3335 | |
3336 | journal_pages = roundup((__u64)ic->journal_sections * ic->journal_section_sectors, | |
3337 | PAGE_SIZE >> SECTOR_SHIFT) >> (PAGE_SHIFT - SECTOR_SHIFT); | |
3338 | journal_desc_size = journal_pages * sizeof(struct page_list); | |
ca79b0c2 | 3339 | if (journal_pages >= totalram_pages() - totalhigh_pages() || journal_desc_size > ULONG_MAX) { |
1aa0efd4 MS |
3340 | *error = "Journal doesn't fit into memory"; |
3341 | r = -ENOMEM; | |
3342 | goto bad; | |
3343 | } | |
3344 | ic->journal_pages = journal_pages; | |
3345 | ||
d5027e03 | 3346 | ic->journal = dm_integrity_alloc_page_list(ic->journal_pages); |
1aa0efd4 MS |
3347 | if (!ic->journal) { |
3348 | *error = "Could not allocate memory for journal"; | |
3349 | r = -ENOMEM; | |
3350 | goto bad; | |
3351 | } | |
3352 | if (ic->journal_crypt_alg.alg_string) { | |
3353 | unsigned ivsize, blocksize; | |
3354 | struct journal_completion comp; | |
3355 | ||
3356 | comp.ic = ic; | |
3357 | ic->journal_crypt = crypto_alloc_skcipher(ic->journal_crypt_alg.alg_string, 0, 0); | |
3358 | if (IS_ERR(ic->journal_crypt)) { | |
3359 | *error = "Invalid journal cipher"; | |
3360 | r = PTR_ERR(ic->journal_crypt); | |
3361 | ic->journal_crypt = NULL; | |
3362 | goto bad; | |
3363 | } | |
3364 | ivsize = crypto_skcipher_ivsize(ic->journal_crypt); | |
3365 | blocksize = crypto_skcipher_blocksize(ic->journal_crypt); | |
3366 | ||
3367 | if (ic->journal_crypt_alg.key) { | |
3368 | r = crypto_skcipher_setkey(ic->journal_crypt, ic->journal_crypt_alg.key, | |
3369 | ic->journal_crypt_alg.key_size); | |
3370 | if (r) { | |
3371 | *error = "Error setting encryption key"; | |
3372 | goto bad; | |
3373 | } | |
3374 | } | |
3375 | DEBUG_print("cipher %s, block size %u iv size %u\n", | |
3376 | ic->journal_crypt_alg.alg_string, blocksize, ivsize); | |
3377 | ||
d5027e03 | 3378 | ic->journal_io = dm_integrity_alloc_page_list(ic->journal_pages); |
1aa0efd4 MS |
3379 | if (!ic->journal_io) { |
3380 | *error = "Could not allocate memory for journal io"; | |
3381 | r = -ENOMEM; | |
3382 | goto bad; | |
3383 | } | |
3384 | ||
3385 | if (blocksize == 1) { | |
3386 | struct scatterlist *sg; | |
717f4b1c MP |
3387 | |
3388 | req = skcipher_request_alloc(ic->journal_crypt, GFP_KERNEL); | |
3389 | if (!req) { | |
3390 | *error = "Could not allocate crypt request"; | |
3391 | r = -ENOMEM; | |
3392 | goto bad; | |
3393 | } | |
3394 | ||
131670c2 | 3395 | crypt_iv = kzalloc(ivsize, GFP_KERNEL); |
717f4b1c MP |
3396 | if (!crypt_iv) { |
3397 | *error = "Could not allocate iv"; | |
3398 | r = -ENOMEM; | |
3399 | goto bad; | |
3400 | } | |
1aa0efd4 | 3401 | |
d5027e03 | 3402 | ic->journal_xor = dm_integrity_alloc_page_list(ic->journal_pages); |
1aa0efd4 MS |
3403 | if (!ic->journal_xor) { |
3404 | *error = "Could not allocate memory for journal xor"; | |
3405 | r = -ENOMEM; | |
3406 | goto bad; | |
3407 | } | |
3408 | ||
344476e1 KC |
3409 | sg = kvmalloc_array(ic->journal_pages + 1, |
3410 | sizeof(struct scatterlist), | |
3411 | GFP_KERNEL); | |
1aa0efd4 MS |
3412 | if (!sg) { |
3413 | *error = "Unable to allocate sg list"; | |
3414 | r = -ENOMEM; | |
3415 | goto bad; | |
3416 | } | |
3417 | sg_init_table(sg, ic->journal_pages + 1); | |
3418 | for (i = 0; i < ic->journal_pages; i++) { | |
3419 | char *va = lowmem_page_address(ic->journal_xor[i].page); | |
3420 | clear_page(va); | |
3421 | sg_set_buf(&sg[i], va, PAGE_SIZE); | |
3422 | } | |
3423 | sg_set_buf(&sg[i], &ic->commit_ids, sizeof ic->commit_ids); | |
1aa0efd4 | 3424 | |
05d6909e MS |
3425 | skcipher_request_set_crypt(req, sg, sg, |
3426 | PAGE_SIZE * ic->journal_pages + sizeof ic->commit_ids, crypt_iv); | |
b5e8ad92 | 3427 | init_completion(&comp.comp); |
1aa0efd4 MS |
3428 | comp.in_flight = (atomic_t)ATOMIC_INIT(1); |
3429 | if (do_crypt(true, req, &comp)) | |
3430 | wait_for_completion(&comp.comp); | |
3431 | kvfree(sg); | |
3432 | r = dm_integrity_failed(ic); | |
3433 | if (r) { | |
3434 | *error = "Unable to encrypt journal"; | |
3435 | goto bad; | |
3436 | } | |
3437 | DEBUG_bytes(lowmem_page_address(ic->journal_xor[0].page), 64, "xor data"); | |
3438 | ||
3439 | crypto_free_skcipher(ic->journal_crypt); | |
3440 | ic->journal_crypt = NULL; | |
3441 | } else { | |
1aa0efd4 | 3442 | unsigned crypt_len = roundup(ivsize, blocksize); |
56b67a4f | 3443 | |
717f4b1c MP |
3444 | req = skcipher_request_alloc(ic->journal_crypt, GFP_KERNEL); |
3445 | if (!req) { | |
3446 | *error = "Could not allocate crypt request"; | |
3447 | r = -ENOMEM; | |
3448 | goto bad; | |
3449 | } | |
3450 | ||
3451 | crypt_iv = kmalloc(ivsize, GFP_KERNEL); | |
3452 | if (!crypt_iv) { | |
3453 | *error = "Could not allocate iv"; | |
3454 | r = -ENOMEM; | |
3455 | goto bad; | |
3456 | } | |
3457 | ||
56b67a4f MP |
3458 | crypt_data = kmalloc(crypt_len, GFP_KERNEL); |
3459 | if (!crypt_data) { | |
3460 | *error = "Unable to allocate crypt data"; | |
3461 | r = -ENOMEM; | |
3462 | goto bad; | |
3463 | } | |
1aa0efd4 | 3464 | |
1aa0efd4 MS |
3465 | ic->journal_scatterlist = dm_integrity_alloc_journal_scatterlist(ic, ic->journal); |
3466 | if (!ic->journal_scatterlist) { | |
3467 | *error = "Unable to allocate sg list"; | |
3468 | r = -ENOMEM; | |
3469 | goto bad; | |
3470 | } | |
3471 | ic->journal_io_scatterlist = dm_integrity_alloc_journal_scatterlist(ic, ic->journal_io); | |
3472 | if (!ic->journal_io_scatterlist) { | |
3473 | *error = "Unable to allocate sg list"; | |
3474 | r = -ENOMEM; | |
3475 | goto bad; | |
3476 | } | |
344476e1 KC |
3477 | ic->sk_requests = kvmalloc_array(ic->journal_sections, |
3478 | sizeof(struct skcipher_request *), | |
3479 | GFP_KERNEL | __GFP_ZERO); | |
1aa0efd4 MS |
3480 | if (!ic->sk_requests) { |
3481 | *error = "Unable to allocate sk requests"; | |
3482 | r = -ENOMEM; | |
3483 | goto bad; | |
3484 | } | |
3485 | for (i = 0; i < ic->journal_sections; i++) { | |
3486 | struct scatterlist sg; | |
3487 | struct skcipher_request *section_req; | |
3488 | __u32 section_le = cpu_to_le32(i); | |
3489 | ||
717f4b1c | 3490 | memset(crypt_iv, 0x00, ivsize); |
1aa0efd4 MS |
3491 | memset(crypt_data, 0x00, crypt_len); |
3492 | memcpy(crypt_data, §ion_le, min((size_t)crypt_len, sizeof(section_le))); | |
3493 | ||
3494 | sg_init_one(&sg, crypt_data, crypt_len); | |
717f4b1c | 3495 | skcipher_request_set_crypt(req, &sg, &sg, crypt_len, crypt_iv); |
b5e8ad92 | 3496 | init_completion(&comp.comp); |
1aa0efd4 MS |
3497 | comp.in_flight = (atomic_t)ATOMIC_INIT(1); |
3498 | if (do_crypt(true, req, &comp)) | |
3499 | wait_for_completion(&comp.comp); | |
3500 | ||
3501 | r = dm_integrity_failed(ic); | |
3502 | if (r) { | |
3503 | *error = "Unable to generate iv"; | |
3504 | goto bad; | |
3505 | } | |
3506 | ||
3507 | section_req = skcipher_request_alloc(ic->journal_crypt, GFP_KERNEL); | |
3508 | if (!section_req) { | |
3509 | *error = "Unable to allocate crypt request"; | |
3510 | r = -ENOMEM; | |
3511 | goto bad; | |
3512 | } | |
6da2ec56 KC |
3513 | section_req->iv = kmalloc_array(ivsize, 2, |
3514 | GFP_KERNEL); | |
1aa0efd4 MS |
3515 | if (!section_req->iv) { |
3516 | skcipher_request_free(section_req); | |
3517 | *error = "Unable to allocate iv"; | |
3518 | r = -ENOMEM; | |
3519 | goto bad; | |
3520 | } | |
3521 | memcpy(section_req->iv + ivsize, crypt_data, ivsize); | |
3522 | section_req->cryptlen = (size_t)ic->journal_section_sectors << SECTOR_SHIFT; | |
3523 | ic->sk_requests[i] = section_req; | |
3524 | DEBUG_bytes(crypt_data, ivsize, "iv(%u)", i); | |
3525 | } | |
3526 | } | |
3527 | } | |
3528 | ||
3529 | for (i = 0; i < N_COMMIT_IDS; i++) { | |
3530 | unsigned j; | |
3531 | retest_commit_id: | |
3532 | for (j = 0; j < i; j++) { | |
3533 | if (ic->commit_ids[j] == ic->commit_ids[i]) { | |
3534 | ic->commit_ids[i] = cpu_to_le64(le64_to_cpu(ic->commit_ids[i]) + 1); | |
3535 | goto retest_commit_id; | |
3536 | } | |
3537 | } | |
3538 | DEBUG_print("commit id %u: %016llx\n", i, ic->commit_ids[i]); | |
3539 | } | |
3540 | ||
3541 | journal_tree_size = (__u64)ic->journal_entries * sizeof(struct journal_node); | |
3542 | if (journal_tree_size > ULONG_MAX) { | |
3543 | *error = "Journal doesn't fit into memory"; | |
3544 | r = -ENOMEM; | |
3545 | goto bad; | |
3546 | } | |
702a6204 | 3547 | ic->journal_tree = kvmalloc(journal_tree_size, GFP_KERNEL); |
1aa0efd4 MS |
3548 | if (!ic->journal_tree) { |
3549 | *error = "Could not allocate memory for journal tree"; | |
3550 | r = -ENOMEM; | |
3551 | } | |
3552 | bad: | |
56b67a4f | 3553 | kfree(crypt_data); |
717f4b1c MP |
3554 | kfree(crypt_iv); |
3555 | skcipher_request_free(req); | |
3556 | ||
1aa0efd4 MS |
3557 | return r; |
3558 | } | |
3559 | ||
7eada909 | 3560 | /* |
56b67a4f | 3561 | * Construct a integrity mapping |
7eada909 MP |
3562 | * |
3563 | * Arguments: | |
3564 | * device | |
3565 | * offset from the start of the device | |
3566 | * tag size | |
468dfca3 | 3567 | * D - direct writes, J - journal writes, B - bitmap mode, R - recovery mode |
7eada909 MP |
3568 | * number of optional arguments |
3569 | * optional arguments: | |
56b67a4f MP |
3570 | * journal_sectors |
3571 | * interleave_sectors | |
3572 | * buffer_sectors | |
3573 | * journal_watermark | |
3574 | * commit_time | |
88ad5d1e MP |
3575 | * meta_device |
3576 | * block_size | |
468dfca3 MP |
3577 | * sectors_per_bit |
3578 | * bitmap_flush_interval | |
56b67a4f MP |
3579 | * internal_hash |
3580 | * journal_crypt | |
3581 | * journal_mac | |
88ad5d1e | 3582 | * recalculate |
7eada909 MP |
3583 | */ |
3584 | static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv) | |
3585 | { | |
3586 | struct dm_integrity_c *ic; | |
3587 | char dummy; | |
3588 | int r; | |
7eada909 MP |
3589 | unsigned extra_args; |
3590 | struct dm_arg_set as; | |
5916a22b | 3591 | static const struct dm_arg _args[] = { |
9d609f85 | 3592 | {0, 9, "Invalid number of feature args"}, |
7eada909 MP |
3593 | }; |
3594 | unsigned journal_sectors, interleave_sectors, buffer_sectors, journal_watermark, sync_msec; | |
3595 | bool should_write_sb; | |
7eada909 MP |
3596 | __u64 threshold; |
3597 | unsigned long long start; | |
468dfca3 MP |
3598 | __s8 log2_sectors_per_bitmap_bit = -1; |
3599 | __s8 log2_blocks_per_bitmap_bit; | |
3600 | __u64 bits_in_journal; | |
3601 | __u64 n_bitmap_bits; | |
7eada909 MP |
3602 | |
3603 | #define DIRECT_ARGUMENTS 4 | |
3604 | ||
3605 | if (argc <= DIRECT_ARGUMENTS) { | |
3606 | ti->error = "Invalid argument count"; | |
3607 | return -EINVAL; | |
3608 | } | |
3609 | ||
3610 | ic = kzalloc(sizeof(struct dm_integrity_c), GFP_KERNEL); | |
3611 | if (!ic) { | |
3612 | ti->error = "Cannot allocate integrity context"; | |
3613 | return -ENOMEM; | |
3614 | } | |
3615 | ti->private = ic; | |
3616 | ti->per_io_data_size = sizeof(struct dm_integrity_io); | |
adc0daad | 3617 | ic->ti = ti; |
7eada909 | 3618 | |
7eada909 | 3619 | ic->in_progress = RB_ROOT; |
724376a0 | 3620 | INIT_LIST_HEAD(&ic->wait_list); |
7eada909 MP |
3621 | init_waitqueue_head(&ic->endio_wait); |
3622 | bio_list_init(&ic->flush_bio_list); | |
3623 | init_waitqueue_head(&ic->copy_to_journal_wait); | |
3624 | init_completion(&ic->crypto_backoff); | |
3f2e5393 | 3625 | atomic64_set(&ic->number_of_mismatches, 0); |
468dfca3 | 3626 | ic->bitmap_flush_interval = BITMAP_FLUSH_INTERVAL; |
7eada909 MP |
3627 | |
3628 | r = dm_get_device(ti, argv[0], dm_table_get_mode(ti->table), &ic->dev); | |
3629 | if (r) { | |
3630 | ti->error = "Device lookup failed"; | |
3631 | goto bad; | |
3632 | } | |
3633 | ||
3634 | if (sscanf(argv[1], "%llu%c", &start, &dummy) != 1 || start != (sector_t)start) { | |
3635 | ti->error = "Invalid starting offset"; | |
3636 | r = -EINVAL; | |
3637 | goto bad; | |
3638 | } | |
3639 | ic->start = start; | |
3640 | ||
3641 | if (strcmp(argv[2], "-")) { | |
3642 | if (sscanf(argv[2], "%u%c", &ic->tag_size, &dummy) != 1 || !ic->tag_size) { | |
3643 | ti->error = "Invalid tag size"; | |
3644 | r = -EINVAL; | |
3645 | goto bad; | |
3646 | } | |
3647 | } | |
3648 | ||
05d6909e MS |
3649 | if (!strcmp(argv[3], "J") || !strcmp(argv[3], "B") || |
3650 | !strcmp(argv[3], "D") || !strcmp(argv[3], "R")) { | |
7eada909 | 3651 | ic->mode = argv[3][0]; |
468dfca3 MP |
3652 | } else { |
3653 | ti->error = "Invalid mode (expecting J, B, D, R)"; | |
7eada909 MP |
3654 | r = -EINVAL; |
3655 | goto bad; | |
3656 | } | |
3657 | ||
356d9d52 | 3658 | journal_sectors = 0; |
7eada909 MP |
3659 | interleave_sectors = DEFAULT_INTERLEAVE_SECTORS; |
3660 | buffer_sectors = DEFAULT_BUFFER_SECTORS; | |
3661 | journal_watermark = DEFAULT_JOURNAL_WATERMARK; | |
3662 | sync_msec = DEFAULT_SYNC_MSEC; | |
9d609f85 | 3663 | ic->sectors_per_block = 1; |
7eada909 MP |
3664 | |
3665 | as.argc = argc - DIRECT_ARGUMENTS; | |
3666 | as.argv = argv + DIRECT_ARGUMENTS; | |
3667 | r = dm_read_arg_group(_args, &as, &extra_args, &ti->error); | |
3668 | if (r) | |
3669 | goto bad; | |
3670 | ||
3671 | while (extra_args--) { | |
3672 | const char *opt_string; | |
3673 | unsigned val; | |
468dfca3 | 3674 | unsigned long long llval; |
7eada909 MP |
3675 | opt_string = dm_shift_arg(&as); |
3676 | if (!opt_string) { | |
3677 | r = -EINVAL; | |
3678 | ti->error = "Not enough feature arguments"; | |
3679 | goto bad; | |
3680 | } | |
56b67a4f | 3681 | if (sscanf(opt_string, "journal_sectors:%u%c", &val, &dummy) == 1) |
356d9d52 | 3682 | journal_sectors = val ? val : 1; |
56b67a4f | 3683 | else if (sscanf(opt_string, "interleave_sectors:%u%c", &val, &dummy) == 1) |
7eada909 | 3684 | interleave_sectors = val; |
56b67a4f | 3685 | else if (sscanf(opt_string, "buffer_sectors:%u%c", &val, &dummy) == 1) |
7eada909 | 3686 | buffer_sectors = val; |
56b67a4f | 3687 | else if (sscanf(opt_string, "journal_watermark:%u%c", &val, &dummy) == 1 && val <= 100) |
7eada909 | 3688 | journal_watermark = val; |
56b67a4f | 3689 | else if (sscanf(opt_string, "commit_time:%u%c", &val, &dummy) == 1) |
7eada909 | 3690 | sync_msec = val; |
0d74e6a3 | 3691 | else if (!strncmp(opt_string, "meta_device:", strlen("meta_device:"))) { |
356d9d52 MP |
3692 | if (ic->meta_dev) { |
3693 | dm_put_device(ti, ic->meta_dev); | |
3694 | ic->meta_dev = NULL; | |
3695 | } | |
05d6909e MS |
3696 | r = dm_get_device(ti, strchr(opt_string, ':') + 1, |
3697 | dm_table_get_mode(ti->table), &ic->meta_dev); | |
356d9d52 MP |
3698 | if (r) { |
3699 | ti->error = "Device lookup failed"; | |
3700 | goto bad; | |
3701 | } | |
3702 | } else if (sscanf(opt_string, "block_size:%u%c", &val, &dummy) == 1) { | |
9d609f85 MP |
3703 | if (val < 1 << SECTOR_SHIFT || |
3704 | val > MAX_SECTORS_PER_BLOCK << SECTOR_SHIFT || | |
3705 | (val & (val -1))) { | |
3706 | r = -EINVAL; | |
3707 | ti->error = "Invalid block_size argument"; | |
3708 | goto bad; | |
3709 | } | |
3710 | ic->sectors_per_block = val >> SECTOR_SHIFT; | |
468dfca3 MP |
3711 | } else if (sscanf(opt_string, "sectors_per_bit:%llu%c", &llval, &dummy) == 1) { |
3712 | log2_sectors_per_bitmap_bit = !llval ? 0 : __ilog2_u64(llval); | |
3713 | } else if (sscanf(opt_string, "bitmap_flush_interval:%u%c", &val, &dummy) == 1) { | |
3714 | if (val >= (uint64_t)UINT_MAX * 1000 / HZ) { | |
3715 | r = -EINVAL; | |
3716 | ti->error = "Invalid bitmap_flush_interval argument"; | |
3717 | } | |
3718 | ic->bitmap_flush_interval = msecs_to_jiffies(val); | |
0d74e6a3 | 3719 | } else if (!strncmp(opt_string, "internal_hash:", strlen("internal_hash:"))) { |
7eada909 | 3720 | r = get_alg_and_key(opt_string, &ic->internal_hash_alg, &ti->error, |
56b67a4f | 3721 | "Invalid internal_hash argument"); |
7eada909 MP |
3722 | if (r) |
3723 | goto bad; | |
0d74e6a3 | 3724 | } else if (!strncmp(opt_string, "journal_crypt:", strlen("journal_crypt:"))) { |
7eada909 | 3725 | r = get_alg_and_key(opt_string, &ic->journal_crypt_alg, &ti->error, |
56b67a4f | 3726 | "Invalid journal_crypt argument"); |
7eada909 MP |
3727 | if (r) |
3728 | goto bad; | |
0d74e6a3 | 3729 | } else if (!strncmp(opt_string, "journal_mac:", strlen("journal_mac:"))) { |
7eada909 | 3730 | r = get_alg_and_key(opt_string, &ic->journal_mac_alg, &ti->error, |
56b67a4f | 3731 | "Invalid journal_mac argument"); |
7eada909 MP |
3732 | if (r) |
3733 | goto bad; | |
a3fcf725 | 3734 | } else if (!strcmp(opt_string, "recalculate")) { |
468dfca3 | 3735 | ic->recalculate_flag = true; |
d537858a MP |
3736 | } else if (!strcmp(opt_string, "fix_padding")) { |
3737 | ic->fix_padding = true; | |
7eada909 MP |
3738 | } else { |
3739 | r = -EINVAL; | |
3740 | ti->error = "Invalid argument"; | |
3741 | goto bad; | |
3742 | } | |
3743 | } | |
3744 | ||
356d9d52 MP |
3745 | ic->data_device_sectors = i_size_read(ic->dev->bdev->bd_inode) >> SECTOR_SHIFT; |
3746 | if (!ic->meta_dev) | |
3747 | ic->meta_device_sectors = ic->data_device_sectors; | |
3748 | else | |
3749 | ic->meta_device_sectors = i_size_read(ic->meta_dev->bdev->bd_inode) >> SECTOR_SHIFT; | |
3750 | ||
3751 | if (!journal_sectors) { | |
3752 | journal_sectors = min((sector_t)DEFAULT_MAX_JOURNAL_SECTORS, | |
05d6909e | 3753 | ic->data_device_sectors >> DEFAULT_JOURNAL_SIZE_FACTOR); |
356d9d52 MP |
3754 | } |
3755 | ||
3756 | if (!buffer_sectors) | |
3757 | buffer_sectors = 1; | |
3758 | ic->log2_buffer_sectors = min((int)__fls(buffer_sectors), 31 - SECTOR_SHIFT); | |
3759 | ||
7eada909 MP |
3760 | r = get_mac(&ic->internal_hash, &ic->internal_hash_alg, &ti->error, |
3761 | "Invalid internal hash", "Error setting internal hash key"); | |
3762 | if (r) | |
3763 | goto bad; | |
3764 | ||
3765 | r = get_mac(&ic->journal_mac, &ic->journal_mac_alg, &ti->error, | |
3766 | "Invalid journal mac", "Error setting journal mac key"); | |
3767 | if (r) | |
3768 | goto bad; | |
3769 | ||
3770 | if (!ic->tag_size) { | |
3771 | if (!ic->internal_hash) { | |
3772 | ti->error = "Unknown tag size"; | |
3773 | r = -EINVAL; | |
3774 | goto bad; | |
3775 | } | |
3776 | ic->tag_size = crypto_shash_digestsize(ic->internal_hash); | |
3777 | } | |
3778 | if (ic->tag_size > MAX_TAG_SIZE) { | |
3779 | ti->error = "Too big tag size"; | |
3780 | r = -EINVAL; | |
3781 | goto bad; | |
3782 | } | |
3783 | if (!(ic->tag_size & (ic->tag_size - 1))) | |
3784 | ic->log2_tag_size = __ffs(ic->tag_size); | |
3785 | else | |
3786 | ic->log2_tag_size = -1; | |
3787 | ||
468dfca3 MP |
3788 | if (ic->mode == 'B' && !ic->internal_hash) { |
3789 | r = -EINVAL; | |
3790 | ti->error = "Bitmap mode can be only used with internal hash"; | |
3791 | goto bad; | |
3792 | } | |
3793 | ||
7eada909 MP |
3794 | ic->autocommit_jiffies = msecs_to_jiffies(sync_msec); |
3795 | ic->autocommit_msec = sync_msec; | |
8376d3c1 | 3796 | timer_setup(&ic->autocommit_timer, autocommit_fn, 0); |
7eada909 MP |
3797 | |
3798 | ic->io = dm_io_client_create(); | |
3799 | if (IS_ERR(ic->io)) { | |
3800 | r = PTR_ERR(ic->io); | |
3801 | ic->io = NULL; | |
3802 | ti->error = "Cannot allocate dm io"; | |
3803 | goto bad; | |
3804 | } | |
3805 | ||
6f1c819c KO |
3806 | r = mempool_init_slab_pool(&ic->journal_io_mempool, JOURNAL_IO_MEMPOOL, journal_io_cache); |
3807 | if (r) { | |
7eada909 MP |
3808 | ti->error = "Cannot allocate mempool"; |
3809 | goto bad; | |
3810 | } | |
3811 | ||
3812 | ic->metadata_wq = alloc_workqueue("dm-integrity-metadata", | |
3813 | WQ_MEM_RECLAIM, METADATA_WORKQUEUE_MAX_ACTIVE); | |
3814 | if (!ic->metadata_wq) { | |
3815 | ti->error = "Cannot allocate workqueue"; | |
3816 | r = -ENOMEM; | |
3817 | goto bad; | |
3818 | } | |
3819 | ||
3820 | /* | |
3821 | * If this workqueue were percpu, it would cause bio reordering | |
3822 | * and reduced performance. | |
3823 | */ | |
3824 | ic->wait_wq = alloc_workqueue("dm-integrity-wait", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); | |
3825 | if (!ic->wait_wq) { | |
3826 | ti->error = "Cannot allocate workqueue"; | |
3827 | r = -ENOMEM; | |
3828 | goto bad; | |
3829 | } | |
3830 | ||
53770f0e MP |
3831 | ic->offload_wq = alloc_workqueue("dm-integrity-offload", WQ_MEM_RECLAIM, |
3832 | METADATA_WORKQUEUE_MAX_ACTIVE); | |
3833 | if (!ic->offload_wq) { | |
3834 | ti->error = "Cannot allocate workqueue"; | |
3835 | r = -ENOMEM; | |
3836 | goto bad; | |
3837 | } | |
3838 | ||
7eada909 MP |
3839 | ic->commit_wq = alloc_workqueue("dm-integrity-commit", WQ_MEM_RECLAIM, 1); |
3840 | if (!ic->commit_wq) { | |
3841 | ti->error = "Cannot allocate workqueue"; | |
3842 | r = -ENOMEM; | |
3843 | goto bad; | |
3844 | } | |
3845 | INIT_WORK(&ic->commit_work, integrity_commit); | |
3846 | ||
468dfca3 | 3847 | if (ic->mode == 'J' || ic->mode == 'B') { |
7eada909 MP |
3848 | ic->writer_wq = alloc_workqueue("dm-integrity-writer", WQ_MEM_RECLAIM, 1); |
3849 | if (!ic->writer_wq) { | |
3850 | ti->error = "Cannot allocate workqueue"; | |
3851 | r = -ENOMEM; | |
3852 | goto bad; | |
3853 | } | |
3854 | INIT_WORK(&ic->writer_work, integrity_writer); | |
3855 | } | |
3856 | ||
3857 | ic->sb = alloc_pages_exact(SB_SECTORS << SECTOR_SHIFT, GFP_KERNEL); | |
3858 | if (!ic->sb) { | |
3859 | r = -ENOMEM; | |
3860 | ti->error = "Cannot allocate superblock area"; | |
3861 | goto bad; | |
3862 | } | |
3863 | ||
3864 | r = sync_rw_sb(ic, REQ_OP_READ, 0); | |
3865 | if (r) { | |
3866 | ti->error = "Error reading superblock"; | |
3867 | goto bad; | |
3868 | } | |
c2bcb2b7 MP |
3869 | should_write_sb = false; |
3870 | if (memcmp(ic->sb->magic, SB_MAGIC, 8)) { | |
3871 | if (ic->mode != 'R') { | |
56b67a4f MP |
3872 | if (memchr_inv(ic->sb, 0, SB_SECTORS << SECTOR_SHIFT)) { |
3873 | r = -EINVAL; | |
3874 | ti->error = "The device is not initialized"; | |
3875 | goto bad; | |
7eada909 MP |
3876 | } |
3877 | } | |
3878 | ||
3879 | r = initialize_superblock(ic, journal_sectors, interleave_sectors); | |
3880 | if (r) { | |
3881 | ti->error = "Could not initialize superblock"; | |
3882 | goto bad; | |
3883 | } | |
c2bcb2b7 MP |
3884 | if (ic->mode != 'R') |
3885 | should_write_sb = true; | |
7eada909 MP |
3886 | } |
3887 | ||
d537858a | 3888 | if (!ic->sb->version || ic->sb->version > SB_VERSION_4) { |
7eada909 MP |
3889 | r = -EINVAL; |
3890 | ti->error = "Unknown version"; | |
3891 | goto bad; | |
3892 | } | |
3893 | if (le16_to_cpu(ic->sb->integrity_tag_size) != ic->tag_size) { | |
3894 | r = -EINVAL; | |
9d609f85 MP |
3895 | ti->error = "Tag size doesn't match the information in superblock"; |
3896 | goto bad; | |
3897 | } | |
3898 | if (ic->sb->log2_sectors_per_block != __ffs(ic->sectors_per_block)) { | |
3899 | r = -EINVAL; | |
3900 | ti->error = "Block size doesn't match the information in superblock"; | |
7eada909 MP |
3901 | goto bad; |
3902 | } | |
bc86a41e MP |
3903 | if (!le32_to_cpu(ic->sb->journal_sections)) { |
3904 | r = -EINVAL; | |
3905 | ti->error = "Corrupted superblock, journal_sections is 0"; | |
3906 | goto bad; | |
3907 | } | |
7eada909 | 3908 | /* make sure that ti->max_io_len doesn't overflow */ |
356d9d52 MP |
3909 | if (!ic->meta_dev) { |
3910 | if (ic->sb->log2_interleave_sectors < MIN_LOG2_INTERLEAVE_SECTORS || | |
3911 | ic->sb->log2_interleave_sectors > MAX_LOG2_INTERLEAVE_SECTORS) { | |
3912 | r = -EINVAL; | |
3913 | ti->error = "Invalid interleave_sectors in the superblock"; | |
3914 | goto bad; | |
3915 | } | |
3916 | } else { | |
3917 | if (ic->sb->log2_interleave_sectors) { | |
3918 | r = -EINVAL; | |
3919 | ti->error = "Invalid interleave_sectors in the superblock"; | |
3920 | goto bad; | |
3921 | } | |
7eada909 MP |
3922 | } |
3923 | ic->provided_data_sectors = le64_to_cpu(ic->sb->provided_data_sectors); | |
3924 | if (ic->provided_data_sectors != le64_to_cpu(ic->sb->provided_data_sectors)) { | |
3925 | /* test for overflow */ | |
3926 | r = -EINVAL; | |
3927 | ti->error = "The superblock has 64-bit device size, but the kernel was compiled with 32-bit sectors"; | |
3928 | goto bad; | |
3929 | } | |
3930 | if (!!(ic->sb->flags & cpu_to_le32(SB_FLAG_HAVE_JOURNAL_MAC)) != !!ic->journal_mac_alg.alg_string) { | |
3931 | r = -EINVAL; | |
3932 | ti->error = "Journal mac mismatch"; | |
3933 | goto bad; | |
3934 | } | |
356d9d52 MP |
3935 | |
3936 | try_smaller_buffer: | |
7eada909 MP |
3937 | r = calculate_device_limits(ic); |
3938 | if (r) { | |
356d9d52 MP |
3939 | if (ic->meta_dev) { |
3940 | if (ic->log2_buffer_sectors > 3) { | |
3941 | ic->log2_buffer_sectors--; | |
3942 | goto try_smaller_buffer; | |
3943 | } | |
3944 | } | |
7eada909 MP |
3945 | ti->error = "The device is too small"; |
3946 | goto bad; | |
3947 | } | |
468dfca3 MP |
3948 | |
3949 | if (log2_sectors_per_bitmap_bit < 0) | |
3950 | log2_sectors_per_bitmap_bit = __fls(DEFAULT_SECTORS_PER_BITMAP_BIT); | |
3951 | if (log2_sectors_per_bitmap_bit < ic->sb->log2_sectors_per_block) | |
3952 | log2_sectors_per_bitmap_bit = ic->sb->log2_sectors_per_block; | |
3953 | ||
3954 | bits_in_journal = ((__u64)ic->journal_section_sectors * ic->journal_sections) << (SECTOR_SHIFT + 3); | |
3955 | if (bits_in_journal > UINT_MAX) | |
3956 | bits_in_journal = UINT_MAX; | |
3957 | while (bits_in_journal < (ic->provided_data_sectors + ((sector_t)1 << log2_sectors_per_bitmap_bit) - 1) >> log2_sectors_per_bitmap_bit) | |
3958 | log2_sectors_per_bitmap_bit++; | |
3959 | ||
3960 | log2_blocks_per_bitmap_bit = log2_sectors_per_bitmap_bit - ic->sb->log2_sectors_per_block; | |
3961 | ic->log2_blocks_per_bitmap_bit = log2_blocks_per_bitmap_bit; | |
3962 | if (should_write_sb) { | |
3963 | ic->sb->log2_blocks_per_bitmap_bit = log2_blocks_per_bitmap_bit; | |
3964 | } | |
3965 | n_bitmap_bits = ((ic->provided_data_sectors >> ic->sb->log2_sectors_per_block) | |
3966 | + (((sector_t)1 << log2_blocks_per_bitmap_bit) - 1)) >> log2_blocks_per_bitmap_bit; | |
3967 | ic->n_bitmap_blocks = DIV_ROUND_UP(n_bitmap_bits, BITMAP_BLOCK_SIZE * 8); | |
3968 | ||
356d9d52 MP |
3969 | if (!ic->meta_dev) |
3970 | ic->log2_buffer_sectors = min(ic->log2_buffer_sectors, (__u8)__ffs(ic->metadata_run)); | |
3971 | ||
2ad50606 OM |
3972 | if (ti->len > ic->provided_data_sectors) { |
3973 | r = -EINVAL; | |
3974 | ti->error = "Not enough provided sectors for requested mapping size"; | |
3975 | goto bad; | |
3976 | } | |
7eada909 | 3977 | |
7eada909 MP |
3978 | |
3979 | threshold = (__u64)ic->journal_entries * (100 - journal_watermark); | |
3980 | threshold += 50; | |
3981 | do_div(threshold, 100); | |
3982 | ic->free_sectors_threshold = threshold; | |
3983 | ||
3984 | DEBUG_print("initialized:\n"); | |
3985 | DEBUG_print(" integrity_tag_size %u\n", le16_to_cpu(ic->sb->integrity_tag_size)); | |
3986 | DEBUG_print(" journal_entry_size %u\n", ic->journal_entry_size); | |
3987 | DEBUG_print(" journal_entries_per_sector %u\n", ic->journal_entries_per_sector); | |
3988 | DEBUG_print(" journal_section_entries %u\n", ic->journal_section_entries); | |
3989 | DEBUG_print(" journal_section_sectors %u\n", ic->journal_section_sectors); | |
3990 | DEBUG_print(" journal_sections %u\n", (unsigned)le32_to_cpu(ic->sb->journal_sections)); | |
3991 | DEBUG_print(" journal_entries %u\n", ic->journal_entries); | |
3992 | DEBUG_print(" log2_interleave_sectors %d\n", ic->sb->log2_interleave_sectors); | |
468dfca3 | 3993 | DEBUG_print(" data_device_sectors 0x%llx\n", i_size_read(ic->dev->bdev->bd_inode) >> SECTOR_SHIFT); |
7eada909 MP |
3994 | DEBUG_print(" initial_sectors 0x%x\n", ic->initial_sectors); |
3995 | DEBUG_print(" metadata_run 0x%x\n", ic->metadata_run); | |
3996 | DEBUG_print(" log2_metadata_run %d\n", ic->log2_metadata_run); | |
3997 | DEBUG_print(" provided_data_sectors 0x%llx (%llu)\n", (unsigned long long)ic->provided_data_sectors, | |
3998 | (unsigned long long)ic->provided_data_sectors); | |
3999 | DEBUG_print(" log2_buffer_sectors %u\n", ic->log2_buffer_sectors); | |
468dfca3 | 4000 | DEBUG_print(" bits_in_journal %llu\n", (unsigned long long)bits_in_journal); |
7eada909 | 4001 | |
468dfca3 | 4002 | if (ic->recalculate_flag && !(ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING))) { |
a3fcf725 MP |
4003 | ic->sb->flags |= cpu_to_le32(SB_FLAG_RECALCULATING); |
4004 | ic->sb->recalc_sector = cpu_to_le64(0); | |
4005 | } | |
4006 | ||
468dfca3 | 4007 | if (ic->internal_hash) { |
e8c2566f | 4008 | ic->recalc_wq = alloc_workqueue("dm-integrity-recalc", WQ_MEM_RECLAIM, 1); |
a3fcf725 MP |
4009 | if (!ic->recalc_wq ) { |
4010 | ti->error = "Cannot allocate workqueue"; | |
4011 | r = -ENOMEM; | |
4012 | goto bad; | |
4013 | } | |
4014 | INIT_WORK(&ic->recalc_work, integrity_recalc); | |
4015 | ic->recalc_buffer = vmalloc(RECALC_SECTORS << SECTOR_SHIFT); | |
4016 | if (!ic->recalc_buffer) { | |
4017 | ti->error = "Cannot allocate buffer for recalculating"; | |
4018 | r = -ENOMEM; | |
4019 | goto bad; | |
4020 | } | |
329e0989 KC |
4021 | ic->recalc_tags = kvmalloc_array(RECALC_SECTORS >> ic->sb->log2_sectors_per_block, |
4022 | ic->tag_size, GFP_KERNEL); | |
a3fcf725 MP |
4023 | if (!ic->recalc_tags) { |
4024 | ti->error = "Cannot allocate tags for recalculating"; | |
4025 | r = -ENOMEM; | |
4026 | goto bad; | |
4027 | } | |
4028 | } | |
4029 | ||
356d9d52 MP |
4030 | ic->bufio = dm_bufio_client_create(ic->meta_dev ? ic->meta_dev->bdev : ic->dev->bdev, |
4031 | 1U << (SECTOR_SHIFT + ic->log2_buffer_sectors), 1, 0, NULL, NULL); | |
7eada909 MP |
4032 | if (IS_ERR(ic->bufio)) { |
4033 | r = PTR_ERR(ic->bufio); | |
4034 | ti->error = "Cannot initialize dm-bufio"; | |
4035 | ic->bufio = NULL; | |
4036 | goto bad; | |
4037 | } | |
4038 | dm_bufio_set_sector_offset(ic->bufio, ic->start + ic->initial_sectors); | |
4039 | ||
c2bcb2b7 MP |
4040 | if (ic->mode != 'R') { |
4041 | r = create_journal(ic, &ti->error); | |
4042 | if (r) | |
4043 | goto bad; | |
468dfca3 MP |
4044 | |
4045 | } | |
4046 | ||
4047 | if (ic->mode == 'B') { | |
4048 | unsigned i; | |
4049 | unsigned n_bitmap_pages = DIV_ROUND_UP(ic->n_bitmap_blocks, PAGE_SIZE / BITMAP_BLOCK_SIZE); | |
4050 | ||
4051 | ic->recalc_bitmap = dm_integrity_alloc_page_list(n_bitmap_pages); | |
4052 | if (!ic->recalc_bitmap) { | |
4053 | r = -ENOMEM; | |
4054 | goto bad; | |
4055 | } | |
4056 | ic->may_write_bitmap = dm_integrity_alloc_page_list(n_bitmap_pages); | |
4057 | if (!ic->may_write_bitmap) { | |
4058 | r = -ENOMEM; | |
4059 | goto bad; | |
4060 | } | |
4061 | ic->bbs = kvmalloc_array(ic->n_bitmap_blocks, sizeof(struct bitmap_block_status), GFP_KERNEL); | |
4062 | if (!ic->bbs) { | |
4063 | r = -ENOMEM; | |
4064 | goto bad; | |
4065 | } | |
4066 | INIT_DELAYED_WORK(&ic->bitmap_flush_work, bitmap_flush_work); | |
4067 | for (i = 0; i < ic->n_bitmap_blocks; i++) { | |
4068 | struct bitmap_block_status *bbs = &ic->bbs[i]; | |
4069 | unsigned sector, pl_index, pl_offset; | |
4070 | ||
4071 | INIT_WORK(&bbs->work, bitmap_block_work); | |
4072 | bbs->ic = ic; | |
4073 | bbs->idx = i; | |
4074 | bio_list_init(&bbs->bio_queue); | |
4075 | spin_lock_init(&bbs->bio_queue_lock); | |
4076 | ||
4077 | sector = i * (BITMAP_BLOCK_SIZE >> SECTOR_SHIFT); | |
4078 | pl_index = sector >> (PAGE_SHIFT - SECTOR_SHIFT); | |
4079 | pl_offset = (sector << SECTOR_SHIFT) & (PAGE_SIZE - 1); | |
4080 | ||
4081 | bbs->bitmap = lowmem_page_address(ic->journal[pl_index].page) + pl_offset; | |
4082 | } | |
c2bcb2b7 | 4083 | } |
7eada909 MP |
4084 | |
4085 | if (should_write_sb) { | |
4086 | int r; | |
4087 | ||
4088 | init_journal(ic, 0, ic->journal_sections, 0); | |
4089 | r = dm_integrity_failed(ic); | |
4090 | if (unlikely(r)) { | |
4091 | ti->error = "Error initializing journal"; | |
4092 | goto bad; | |
4093 | } | |
4094 | r = sync_rw_sb(ic, REQ_OP_WRITE, REQ_FUA); | |
4095 | if (r) { | |
4096 | ti->error = "Error initializing superblock"; | |
4097 | goto bad; | |
4098 | } | |
4099 | ic->just_formatted = true; | |
4100 | } | |
4101 | ||
356d9d52 MP |
4102 | if (!ic->meta_dev) { |
4103 | r = dm_set_target_max_io_len(ti, 1U << ic->sb->log2_interleave_sectors); | |
4104 | if (r) | |
4105 | goto bad; | |
4106 | } | |
468dfca3 MP |
4107 | if (ic->mode == 'B') { |
4108 | unsigned max_io_len = ((sector_t)ic->sectors_per_block << ic->log2_blocks_per_bitmap_bit) * (BITMAP_BLOCK_SIZE * 8); | |
4109 | if (!max_io_len) | |
4110 | max_io_len = 1U << 31; | |
4111 | DEBUG_print("max_io_len: old %u, new %u\n", ti->max_io_len, max_io_len); | |
4112 | if (!ti->max_io_len || ti->max_io_len > max_io_len) { | |
4113 | r = dm_set_target_max_io_len(ti, max_io_len); | |
4114 | if (r) | |
4115 | goto bad; | |
4116 | } | |
4117 | } | |
7eada909 MP |
4118 | |
4119 | if (!ic->internal_hash) | |
4120 | dm_integrity_set(ti, ic); | |
4121 | ||
4122 | ti->num_flush_bios = 1; | |
4123 | ti->flush_supported = true; | |
4124 | ||
4125 | return 0; | |
468dfca3 | 4126 | |
7eada909 MP |
4127 | bad: |
4128 | dm_integrity_dtr(ti); | |
4129 | return r; | |
4130 | } | |
4131 | ||
4132 | static void dm_integrity_dtr(struct dm_target *ti) | |
4133 | { | |
4134 | struct dm_integrity_c *ic = ti->private; | |
4135 | ||
4136 | BUG_ON(!RB_EMPTY_ROOT(&ic->in_progress)); | |
724376a0 | 4137 | BUG_ON(!list_empty(&ic->wait_list)); |
7eada909 MP |
4138 | |
4139 | if (ic->metadata_wq) | |
4140 | destroy_workqueue(ic->metadata_wq); | |
4141 | if (ic->wait_wq) | |
4142 | destroy_workqueue(ic->wait_wq); | |
53770f0e MP |
4143 | if (ic->offload_wq) |
4144 | destroy_workqueue(ic->offload_wq); | |
7eada909 MP |
4145 | if (ic->commit_wq) |
4146 | destroy_workqueue(ic->commit_wq); | |
4147 | if (ic->writer_wq) | |
4148 | destroy_workqueue(ic->writer_wq); | |
a3fcf725 MP |
4149 | if (ic->recalc_wq) |
4150 | destroy_workqueue(ic->recalc_wq); | |
97abfde1 MP |
4151 | vfree(ic->recalc_buffer); |
4152 | kvfree(ic->recalc_tags); | |
468dfca3 | 4153 | kvfree(ic->bbs); |
7eada909 MP |
4154 | if (ic->bufio) |
4155 | dm_bufio_client_destroy(ic->bufio); | |
6f1c819c | 4156 | mempool_exit(&ic->journal_io_mempool); |
7eada909 MP |
4157 | if (ic->io) |
4158 | dm_io_client_destroy(ic->io); | |
4159 | if (ic->dev) | |
4160 | dm_put_device(ti, ic->dev); | |
356d9d52 MP |
4161 | if (ic->meta_dev) |
4162 | dm_put_device(ti, ic->meta_dev); | |
d5027e03 MP |
4163 | dm_integrity_free_page_list(ic->journal); |
4164 | dm_integrity_free_page_list(ic->journal_io); | |
4165 | dm_integrity_free_page_list(ic->journal_xor); | |
468dfca3 MP |
4166 | dm_integrity_free_page_list(ic->recalc_bitmap); |
4167 | dm_integrity_free_page_list(ic->may_write_bitmap); | |
7eada909 MP |
4168 | if (ic->journal_scatterlist) |
4169 | dm_integrity_free_journal_scatterlist(ic, ic->journal_scatterlist); | |
4170 | if (ic->journal_io_scatterlist) | |
4171 | dm_integrity_free_journal_scatterlist(ic, ic->journal_io_scatterlist); | |
4172 | if (ic->sk_requests) { | |
4173 | unsigned i; | |
4174 | ||
4175 | for (i = 0; i < ic->journal_sections; i++) { | |
4176 | struct skcipher_request *req = ic->sk_requests[i]; | |
4177 | if (req) { | |
4178 | kzfree(req->iv); | |
4179 | skcipher_request_free(req); | |
4180 | } | |
4181 | } | |
4182 | kvfree(ic->sk_requests); | |
4183 | } | |
4184 | kvfree(ic->journal_tree); | |
4185 | if (ic->sb) | |
4186 | free_pages_exact(ic->sb, SB_SECTORS << SECTOR_SHIFT); | |
4187 | ||
4188 | if (ic->internal_hash) | |
4189 | crypto_free_shash(ic->internal_hash); | |
4190 | free_alg(&ic->internal_hash_alg); | |
4191 | ||
4192 | if (ic->journal_crypt) | |
4193 | crypto_free_skcipher(ic->journal_crypt); | |
4194 | free_alg(&ic->journal_crypt_alg); | |
4195 | ||
4196 | if (ic->journal_mac) | |
4197 | crypto_free_shash(ic->journal_mac); | |
4198 | free_alg(&ic->journal_mac_alg); | |
4199 | ||
4200 | kfree(ic); | |
4201 | } | |
4202 | ||
4203 | static struct target_type integrity_target = { | |
4204 | .name = "integrity", | |
636be424 | 4205 | .version = {1, 5, 0}, |
7eada909 MP |
4206 | .module = THIS_MODULE, |
4207 | .features = DM_TARGET_SINGLETON | DM_TARGET_INTEGRITY, | |
4208 | .ctr = dm_integrity_ctr, | |
4209 | .dtr = dm_integrity_dtr, | |
4210 | .map = dm_integrity_map, | |
4211 | .postsuspend = dm_integrity_postsuspend, | |
4212 | .resume = dm_integrity_resume, | |
4213 | .status = dm_integrity_status, | |
4214 | .iterate_devices = dm_integrity_iterate_devices, | |
9d609f85 | 4215 | .io_hints = dm_integrity_io_hints, |
7eada909 MP |
4216 | }; |
4217 | ||
5efedc9b | 4218 | static int __init dm_integrity_init(void) |
7eada909 MP |
4219 | { |
4220 | int r; | |
4221 | ||
4222 | journal_io_cache = kmem_cache_create("integrity_journal_io", | |
4223 | sizeof(struct journal_io), 0, 0, NULL); | |
4224 | if (!journal_io_cache) { | |
4225 | DMERR("can't allocate journal io cache"); | |
4226 | return -ENOMEM; | |
4227 | } | |
4228 | ||
4229 | r = dm_register_target(&integrity_target); | |
4230 | ||
4231 | if (r < 0) | |
4232 | DMERR("register failed %d", r); | |
4233 | ||
4234 | return r; | |
4235 | } | |
4236 | ||
5efedc9b | 4237 | static void __exit dm_integrity_exit(void) |
7eada909 MP |
4238 | { |
4239 | dm_unregister_target(&integrity_target); | |
4240 | kmem_cache_destroy(journal_io_cache); | |
4241 | } | |
4242 | ||
4243 | module_init(dm_integrity_init); | |
4244 | module_exit(dm_integrity_exit); | |
4245 | ||
4246 | MODULE_AUTHOR("Milan Broz"); | |
4247 | MODULE_AUTHOR("Mikulas Patocka"); | |
4248 | MODULE_DESCRIPTION(DM_NAME " target for integrity tags extension"); | |
4249 | MODULE_LICENSE("GPL"); |