1 /**
2 * resize.c
3 *
4 * Copyright (c) 2015 Jaegeuk Kim <jaegeuk@kernel.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10 #include "fsck.h"
11
get_new_sb(struct f2fs_super_block * sb)12 static int get_new_sb(struct f2fs_super_block *sb)
13 {
14 uint32_t zone_size_bytes;
15 uint64_t zone_align_start_offset;
16 uint32_t blocks_for_sit, blocks_for_nat, blocks_for_ssa;
17 uint32_t sit_segments, nat_segments, diff, total_meta_segments;
18 uint32_t total_valid_blks_available;
19 uint32_t sit_bitmap_size, max_sit_bitmap_size;
20 uint32_t max_nat_bitmap_size, max_nat_segments;
21 uint32_t segment_size_bytes = 1 << (get_sb(log_blocksize) +
22 get_sb(log_blocks_per_seg));
23 uint32_t blks_per_seg = 1 << get_sb(log_blocks_per_seg);
24 uint32_t segs_per_zone = get_sb(segs_per_sec) * get_sb(secs_per_zone);
25
26 set_sb(block_count, c.target_sectors >>
27 get_sb(log_sectors_per_block));
28
29 zone_size_bytes = segment_size_bytes * segs_per_zone;
30 zone_align_start_offset =
31 ((uint64_t) c.start_sector * DEFAULT_SECTOR_SIZE +
32 2 * F2FS_BLKSIZE + zone_size_bytes - 1) /
33 zone_size_bytes * zone_size_bytes -
34 (uint64_t) c.start_sector * DEFAULT_SECTOR_SIZE;
35
36 set_sb(segment_count, (c.target_sectors * c.sector_size -
37 zone_align_start_offset) / segment_size_bytes /
38 c.segs_per_sec * c.segs_per_sec);
39
40 if (c.safe_resize)
41 goto safe_resize;
42
43 blocks_for_sit = SIZE_ALIGN(get_sb(segment_count), SIT_ENTRY_PER_BLOCK);
44 sit_segments = SEG_ALIGN(blocks_for_sit);
45 set_sb(segment_count_sit, sit_segments * 2);
46 set_sb(nat_blkaddr, get_sb(sit_blkaddr) +
47 get_sb(segment_count_sit) * blks_per_seg);
48
49 total_valid_blks_available = (get_sb(segment_count) -
50 (get_sb(segment_count_ckpt) +
51 get_sb(segment_count_sit))) * blks_per_seg;
52 blocks_for_nat = SIZE_ALIGN(total_valid_blks_available,
53 NAT_ENTRY_PER_BLOCK);
54
55 if (c.large_nat_bitmap) {
56 nat_segments = SEG_ALIGN(blocks_for_nat) *
57 DEFAULT_NAT_ENTRY_RATIO / 100;
58 set_sb(segment_count_nat, nat_segments ? nat_segments : 1);
59
60 max_nat_bitmap_size = (get_sb(segment_count_nat) <<
61 get_sb(log_blocks_per_seg)) / 8;
62 set_sb(segment_count_nat, get_sb(segment_count_nat) * 2);
63 } else {
64 set_sb(segment_count_nat, SEG_ALIGN(blocks_for_nat));
65 max_nat_bitmap_size = 0;
66 }
67
68 sit_bitmap_size = ((get_sb(segment_count_sit) / 2) <<
69 get_sb(log_blocks_per_seg)) / 8;
70 if (sit_bitmap_size > MAX_SIT_BITMAP_SIZE)
71 max_sit_bitmap_size = MAX_SIT_BITMAP_SIZE;
72 else
73 max_sit_bitmap_size = sit_bitmap_size;
74
75 if (c.large_nat_bitmap) {
76 /* use cp_payload if free space of f2fs_checkpoint is not enough */
77 if (max_sit_bitmap_size + max_nat_bitmap_size >
78 MAX_BITMAP_SIZE_IN_CKPT) {
79 uint32_t diff = max_sit_bitmap_size +
80 max_nat_bitmap_size -
81 MAX_BITMAP_SIZE_IN_CKPT;
82 set_sb(cp_payload, F2FS_BLK_ALIGN(diff));
83 } else {
84 set_sb(cp_payload, 0);
85 }
86 } else {
87 /*
88 * It should be reserved minimum 1 segment for nat.
89 * When sit is too large, we should expand cp area.
90 * It requires more pages for cp.
91 */
92 if (max_sit_bitmap_size > MAX_SIT_BITMAP_SIZE_IN_CKPT) {
93 max_nat_bitmap_size = MAX_BITMAP_SIZE_IN_CKPT;
94 set_sb(cp_payload, F2FS_BLK_ALIGN(max_sit_bitmap_size));
95 } else {
96 max_nat_bitmap_size = MAX_BITMAP_SIZE_IN_CKPT -
97 max_sit_bitmap_size;
98 set_sb(cp_payload, 0);
99 }
100
101 max_nat_segments = (max_nat_bitmap_size * 8) >>
102 get_sb(log_blocks_per_seg);
103
104 if (get_sb(segment_count_nat) > max_nat_segments)
105 set_sb(segment_count_nat, max_nat_segments);
106
107 set_sb(segment_count_nat, get_sb(segment_count_nat) * 2);
108 }
109
110 set_sb(ssa_blkaddr, get_sb(nat_blkaddr) +
111 get_sb(segment_count_nat) * blks_per_seg);
112
113 total_valid_blks_available = (get_sb(segment_count) -
114 (get_sb(segment_count_ckpt) +
115 get_sb(segment_count_sit) +
116 get_sb(segment_count_nat))) * blks_per_seg;
117
118 blocks_for_ssa = total_valid_blks_available / blks_per_seg + 1;
119
120 set_sb(segment_count_ssa, SEG_ALIGN(blocks_for_ssa));
121
122 total_meta_segments = get_sb(segment_count_ckpt) +
123 get_sb(segment_count_sit) +
124 get_sb(segment_count_nat) +
125 get_sb(segment_count_ssa);
126
127 diff = total_meta_segments % segs_per_zone;
128 if (diff)
129 set_sb(segment_count_ssa, get_sb(segment_count_ssa) +
130 (segs_per_zone - diff));
131
132 set_sb(main_blkaddr, get_sb(ssa_blkaddr) + get_sb(segment_count_ssa) *
133 blks_per_seg);
134
135 safe_resize:
136 set_sb(segment_count_main, get_sb(segment_count) -
137 (get_sb(segment_count_ckpt) +
138 get_sb(segment_count_sit) +
139 get_sb(segment_count_nat) +
140 get_sb(segment_count_ssa)));
141
142 set_sb(section_count, get_sb(segment_count_main) /
143 get_sb(segs_per_sec));
144
145 set_sb(segment_count_main, get_sb(section_count) *
146 get_sb(segs_per_sec));
147
148 /* Let's determine the best reserved and overprovisioned space */
149 if (c.new_overprovision == 0)
150 c.new_overprovision = get_best_overprovision(sb);
151
152 c.new_reserved_segments =
153 (2 * (100 / c.new_overprovision + 1) + 6) *
154 get_sb(segs_per_sec);
155
156 if ((get_sb(segment_count_main) - 2) < c.new_reserved_segments ||
157 get_sb(segment_count_main) * blks_per_seg >
158 get_sb(block_count)) {
159 MSG(0, "\tError: Device size is not sufficient for F2FS volume, "
160 "more segment needed =%u",
161 c.new_reserved_segments -
162 (get_sb(segment_count_main) - 2));
163 return -1;
164 }
165 return 0;
166 }
167
migrate_main(struct f2fs_sb_info * sbi,unsigned int offset)168 static void migrate_main(struct f2fs_sb_info *sbi, unsigned int offset)
169 {
170 void *raw = calloc(BLOCK_SZ, 1);
171 struct seg_entry *se;
172 block_t from, to;
173 int i, j, ret;
174 struct f2fs_summary sum;
175
176 ASSERT(raw != NULL);
177
178 for (i = MAIN_SEGS(sbi) - 1; i >= 0; i--) {
179 se = get_seg_entry(sbi, i);
180 if (!se->valid_blocks)
181 continue;
182
183 for (j = sbi->blocks_per_seg - 1; j >= 0; j--) {
184 if (!f2fs_test_bit(j, (const char *)se->cur_valid_map))
185 continue;
186
187 from = START_BLOCK(sbi, i) + j;
188 ret = dev_read_block(raw, from);
189 ASSERT(ret >= 0);
190
191 to = from + offset;
192 ret = dev_write_block(raw, to);
193 ASSERT(ret >= 0);
194
195 get_sum_entry(sbi, from, &sum);
196
197 if (IS_DATASEG(se->type))
198 update_data_blkaddr(sbi, le32_to_cpu(sum.nid),
199 le16_to_cpu(sum.ofs_in_node), to);
200 else
201 update_nat_blkaddr(sbi, 0,
202 le32_to_cpu(sum.nid), to);
203 }
204 }
205 free(raw);
206 DBG(0, "Info: Done to migrate Main area: main_blkaddr = 0x%x -> 0x%x\n",
207 START_BLOCK(sbi, 0),
208 START_BLOCK(sbi, 0) + offset);
209 }
210
move_ssa(struct f2fs_sb_info * sbi,unsigned int segno,block_t new_sum_blk_addr)211 static void move_ssa(struct f2fs_sb_info *sbi, unsigned int segno,
212 block_t new_sum_blk_addr)
213 {
214 struct f2fs_summary_block *sum_blk;
215 int type;
216
217 sum_blk = get_sum_block(sbi, segno, &type);
218 if (type < SEG_TYPE_MAX) {
219 int ret;
220
221 ret = dev_write_block(sum_blk, new_sum_blk_addr);
222 ASSERT(ret >= 0);
223 DBG(1, "Write summary block: (%d) segno=%x/%x --> (%d) %x\n",
224 type, segno, GET_SUM_BLKADDR(sbi, segno),
225 IS_SUM_NODE_SEG(sum_blk->footer),
226 new_sum_blk_addr);
227 }
228 if (type == SEG_TYPE_NODE || type == SEG_TYPE_DATA ||
229 type == SEG_TYPE_MAX) {
230 free(sum_blk);
231 }
232 DBG(1, "Info: Done to migrate SSA blocks\n");
233 }
234
migrate_ssa(struct f2fs_sb_info * sbi,struct f2fs_super_block * new_sb,unsigned int offset)235 static void migrate_ssa(struct f2fs_sb_info *sbi,
236 struct f2fs_super_block *new_sb, unsigned int offset)
237 {
238 struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
239 block_t old_sum_blkaddr = get_sb(ssa_blkaddr);
240 block_t new_sum_blkaddr = get_newsb(ssa_blkaddr);
241 block_t end_sum_blkaddr = get_newsb(main_blkaddr);
242 block_t expand_sum_blkaddr = new_sum_blkaddr +
243 MAIN_SEGS(sbi) - offset;
244 block_t blkaddr;
245 int ret;
246 void *zero_block = calloc(BLOCK_SZ, 1);
247 ASSERT(zero_block);
248
249 if (offset && new_sum_blkaddr < old_sum_blkaddr + offset) {
250 blkaddr = new_sum_blkaddr;
251 while (blkaddr < end_sum_blkaddr) {
252 if (blkaddr < expand_sum_blkaddr) {
253 move_ssa(sbi, offset++, blkaddr++);
254 } else {
255 ret = dev_write_block(zero_block, blkaddr++);
256 ASSERT(ret >=0);
257 }
258 }
259 } else {
260 blkaddr = end_sum_blkaddr - 1;
261 offset = MAIN_SEGS(sbi) - 1;
262 while (blkaddr >= new_sum_blkaddr) {
263 if (blkaddr >= expand_sum_blkaddr) {
264 ret = dev_write_block(zero_block, blkaddr--);
265 ASSERT(ret >=0);
266 } else {
267 move_ssa(sbi, offset--, blkaddr--);
268 }
269 }
270 }
271
272 DBG(0, "Info: Done to migrate SSA blocks: sum_blkaddr = 0x%x -> 0x%x\n",
273 old_sum_blkaddr, new_sum_blkaddr);
274 free(zero_block);
275 }
276
shrink_nats(struct f2fs_sb_info * sbi,struct f2fs_super_block * new_sb)277 static int shrink_nats(struct f2fs_sb_info *sbi,
278 struct f2fs_super_block *new_sb)
279 {
280 struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
281 struct f2fs_nm_info *nm_i = NM_I(sbi);
282 block_t old_nat_blkaddr = get_sb(nat_blkaddr);
283 unsigned int nat_blocks;
284 void *nat_block, *zero_block;
285 int nid, ret, new_max_nid;
286 pgoff_t block_off;
287 pgoff_t block_addr;
288 int seg_off;
289
290 nat_block = malloc(BLOCK_SZ);
291 ASSERT(nat_block);
292 zero_block = calloc(BLOCK_SZ, 1);
293 ASSERT(zero_block);
294
295 nat_blocks = get_newsb(segment_count_nat) >> 1;
296 nat_blocks = nat_blocks << get_sb(log_blocks_per_seg);
297 new_max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks;
298
299 for (nid = nm_i->max_nid - 1; nid > new_max_nid; nid -= NAT_ENTRY_PER_BLOCK) {
300 block_off = nid / NAT_ENTRY_PER_BLOCK;
301 seg_off = block_off >> sbi->log_blocks_per_seg;
302 block_addr = (pgoff_t)(old_nat_blkaddr +
303 (seg_off << sbi->log_blocks_per_seg << 1) +
304 (block_off & ((1 << sbi->log_blocks_per_seg) - 1)));
305
306 if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
307 block_addr += sbi->blocks_per_seg;
308
309 ret = dev_read_block(nat_block, block_addr);
310 ASSERT(ret >= 0);
311
312 if (memcmp(zero_block, nat_block, BLOCK_SZ)) {
313 ret = -1;
314 goto not_avail;
315 }
316 }
317 ret = 0;
318 nm_i->max_nid = new_max_nid;
319 not_avail:
320 free(nat_block);
321 free(zero_block);
322 return ret;
323 }
324
migrate_nat(struct f2fs_sb_info * sbi,struct f2fs_super_block * new_sb)325 static void migrate_nat(struct f2fs_sb_info *sbi,
326 struct f2fs_super_block *new_sb)
327 {
328 struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
329 struct f2fs_nm_info *nm_i = NM_I(sbi);
330 block_t old_nat_blkaddr = get_sb(nat_blkaddr);
331 block_t new_nat_blkaddr = get_newsb(nat_blkaddr);
332 unsigned int nat_blocks;
333 void *nat_block;
334 int nid, ret, new_max_nid;
335 pgoff_t block_off;
336 pgoff_t block_addr;
337 int seg_off;
338
339 nat_block = malloc(BLOCK_SZ);
340 ASSERT(nat_block);
341
342 for (nid = nm_i->max_nid - 1; nid >= 0; nid -= NAT_ENTRY_PER_BLOCK) {
343 block_off = nid / NAT_ENTRY_PER_BLOCK;
344 seg_off = block_off >> sbi->log_blocks_per_seg;
345 block_addr = (pgoff_t)(old_nat_blkaddr +
346 (seg_off << sbi->log_blocks_per_seg << 1) +
347 (block_off & ((1 << sbi->log_blocks_per_seg) - 1)));
348
349 /* move to set #0 */
350 if (f2fs_test_bit(block_off, nm_i->nat_bitmap)) {
351 block_addr += sbi->blocks_per_seg;
352 f2fs_clear_bit(block_off, nm_i->nat_bitmap);
353 }
354
355 ret = dev_read_block(nat_block, block_addr);
356 ASSERT(ret >= 0);
357
358 block_addr = (pgoff_t)(new_nat_blkaddr +
359 (seg_off << sbi->log_blocks_per_seg << 1) +
360 (block_off & ((1 << sbi->log_blocks_per_seg) - 1)));
361
362 /* new bitmap should be zeros */
363 ret = dev_write_block(nat_block, block_addr);
364 ASSERT(ret >= 0);
365 }
366 /* zero out newly assigned nids */
367 memset(nat_block, 0, BLOCK_SZ);
368 nat_blocks = get_newsb(segment_count_nat) >> 1;
369 nat_blocks = nat_blocks << get_sb(log_blocks_per_seg);
370 new_max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks;
371
372 DBG(1, "Write NAT block: %x->%x, max_nid=%x->%x\n",
373 old_nat_blkaddr, new_nat_blkaddr,
374 get_sb(segment_count_nat),
375 get_newsb(segment_count_nat));
376
377 for (nid = nm_i->max_nid; nid < new_max_nid;
378 nid += NAT_ENTRY_PER_BLOCK) {
379 block_off = nid / NAT_ENTRY_PER_BLOCK;
380 seg_off = block_off >> sbi->log_blocks_per_seg;
381 block_addr = (pgoff_t)(new_nat_blkaddr +
382 (seg_off << sbi->log_blocks_per_seg << 1) +
383 (block_off & ((1 << sbi->log_blocks_per_seg) - 1)));
384 ret = dev_write_block(nat_block, block_addr);
385 ASSERT(ret >= 0);
386 DBG(3, "Write NAT: %lx\n", block_addr);
387 }
388 free(nat_block);
389 DBG(0, "Info: Done to migrate NAT blocks: nat_blkaddr = 0x%x -> 0x%x\n",
390 old_nat_blkaddr, new_nat_blkaddr);
391 }
392
migrate_sit(struct f2fs_sb_info * sbi,struct f2fs_super_block * new_sb,unsigned int offset)393 static void migrate_sit(struct f2fs_sb_info *sbi,
394 struct f2fs_super_block *new_sb, unsigned int offset)
395 {
396 struct sit_info *sit_i = SIT_I(sbi);
397 unsigned int ofs = 0, pre_ofs = 0;
398 unsigned int segno, index;
399 struct f2fs_sit_block *sit_blk = calloc(BLOCK_SZ, 1);
400 block_t sit_blks = get_newsb(segment_count_sit) <<
401 (sbi->log_blocks_per_seg - 1);
402 struct seg_entry *se;
403 block_t blk_addr = 0;
404 int ret;
405
406 ASSERT(sit_blk);
407
408 /* initialize with zeros */
409 for (index = 0; index < sit_blks; index++) {
410 ret = dev_write_block(sit_blk, get_newsb(sit_blkaddr) + index);
411 ASSERT(ret >= 0);
412 DBG(3, "Write zero sit: %x\n", get_newsb(sit_blkaddr) + index);
413 }
414
415 for (segno = 0; segno < MAIN_SEGS(sbi); segno++) {
416 struct f2fs_sit_entry *sit;
417
418 se = get_seg_entry(sbi, segno);
419 if (segno < offset) {
420 ASSERT(se->valid_blocks == 0);
421 continue;
422 }
423
424 ofs = SIT_BLOCK_OFFSET(sit_i, segno - offset);
425
426 if (ofs != pre_ofs) {
427 blk_addr = get_newsb(sit_blkaddr) + pre_ofs;
428 ret = dev_write_block(sit_blk, blk_addr);
429 ASSERT(ret >= 0);
430 DBG(1, "Write valid sit: %x\n", blk_addr);
431
432 pre_ofs = ofs;
433 memset(sit_blk, 0, BLOCK_SZ);
434 }
435
436 sit = &sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, segno - offset)];
437 memcpy(sit->valid_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE);
438 sit->vblocks = cpu_to_le16((se->type << SIT_VBLOCKS_SHIFT) |
439 se->valid_blocks);
440 }
441 blk_addr = get_newsb(sit_blkaddr) + ofs;
442 ret = dev_write_block(sit_blk, blk_addr);
443 DBG(1, "Write valid sit: %x\n", blk_addr);
444 ASSERT(ret >= 0);
445
446 free(sit_blk);
447 DBG(0, "Info: Done to restore new SIT blocks: 0x%x\n",
448 get_newsb(sit_blkaddr));
449 }
450
rebuild_checkpoint(struct f2fs_sb_info * sbi,struct f2fs_super_block * new_sb,unsigned int offset)451 static void rebuild_checkpoint(struct f2fs_sb_info *sbi,
452 struct f2fs_super_block *new_sb, unsigned int offset)
453 {
454 struct f2fs_checkpoint *cp = F2FS_CKPT(sbi);
455 unsigned long long cp_ver = get_cp(checkpoint_ver);
456 struct f2fs_checkpoint *new_cp;
457 struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
458 unsigned int free_segment_count, new_segment_count;
459 block_t new_cp_blks = 1 + get_newsb(cp_payload);
460 block_t orphan_blks = 0;
461 block_t new_cp_blk_no, old_cp_blk_no;
462 uint32_t crc = 0;
463 u32 flags;
464 void *buf;
465 int i, ret;
466
467 new_cp = calloc(new_cp_blks * BLOCK_SZ, 1);
468 ASSERT(new_cp);
469
470 buf = malloc(BLOCK_SZ);
471 ASSERT(buf);
472
473 /* ovp / free segments */
474 set_cp(rsvd_segment_count, c.new_reserved_segments);
475 set_cp(overprov_segment_count, (get_newsb(segment_count_main) -
476 get_cp(rsvd_segment_count)) *
477 c.new_overprovision / 100);
478 set_cp(overprov_segment_count, get_cp(overprov_segment_count) +
479 get_cp(rsvd_segment_count));
480
481 DBG(0, "Info: Overprovision ratio = %.3lf%%\n", c.new_overprovision);
482 DBG(0, "Info: Overprovision segments = %u (GC reserved = %u)\n",
483 get_cp(overprov_segment_count),
484 c.new_reserved_segments);
485
486 free_segment_count = get_free_segments(sbi);
487 new_segment_count = get_newsb(segment_count_main) -
488 get_sb(segment_count_main);
489
490 set_cp(free_segment_count, free_segment_count + new_segment_count);
491 set_cp(user_block_count, ((get_newsb(segment_count_main) -
492 get_cp(overprov_segment_count)) * c.blks_per_seg));
493
494 if (is_set_ckpt_flags(cp, CP_ORPHAN_PRESENT_FLAG))
495 orphan_blks = __start_sum_addr(sbi) - 1;
496
497 set_cp(cp_pack_start_sum, 1 + get_newsb(cp_payload));
498 set_cp(cp_pack_total_block_count, 8 + orphan_blks + get_newsb(cp_payload));
499
500 /* cur->segno - offset */
501 for (i = 0; i < NO_CHECK_TYPE; i++) {
502 if (i < CURSEG_HOT_NODE) {
503 set_cp(cur_data_segno[i],
504 CURSEG_I(sbi, i)->segno - offset);
505 } else {
506 int n = i - CURSEG_HOT_NODE;
507
508 set_cp(cur_node_segno[n],
509 CURSEG_I(sbi, i)->segno - offset);
510 }
511 }
512
513 /* sit / nat ver bitmap bytesize */
514 set_cp(sit_ver_bitmap_bytesize,
515 ((get_newsb(segment_count_sit) / 2) <<
516 get_newsb(log_blocks_per_seg)) / 8);
517 set_cp(nat_ver_bitmap_bytesize,
518 ((get_newsb(segment_count_nat) / 2) <<
519 get_newsb(log_blocks_per_seg)) / 8);
520
521 /* update nat_bits flag */
522 flags = update_nat_bits_flags(new_sb, cp, get_cp(ckpt_flags));
523 if (c.large_nat_bitmap)
524 flags |= CP_LARGE_NAT_BITMAP_FLAG;
525
526 if (flags & CP_COMPACT_SUM_FLAG)
527 flags &= ~CP_COMPACT_SUM_FLAG;
528 if (flags & CP_LARGE_NAT_BITMAP_FLAG)
529 set_cp(checksum_offset, CP_MIN_CHKSUM_OFFSET);
530 else
531 set_cp(checksum_offset, CP_CHKSUM_OFFSET);
532
533 set_cp(ckpt_flags, flags);
534
535 memcpy(new_cp, cp, (unsigned char *)cp->sit_nat_version_bitmap -
536 (unsigned char *)cp);
537 if (c.safe_resize)
538 memcpy((void *)new_cp + CP_BITMAP_OFFSET,
539 (void *)cp + CP_BITMAP_OFFSET,
540 F2FS_BLKSIZE - CP_BITMAP_OFFSET);
541
542 new_cp->checkpoint_ver = cpu_to_le64(cp_ver + 1);
543
544 crc = f2fs_checkpoint_chksum(new_cp);
545 *((__le32 *)((unsigned char *)new_cp + get_cp(checksum_offset))) =
546 cpu_to_le32(crc);
547
548 /* Write a new checkpoint in the other set */
549 new_cp_blk_no = old_cp_blk_no = get_sb(cp_blkaddr);
550 if (sbi->cur_cp == 2)
551 old_cp_blk_no += 1 << get_sb(log_blocks_per_seg);
552 else
553 new_cp_blk_no += 1 << get_sb(log_blocks_per_seg);
554
555 /* write first cp */
556 ret = dev_write_block(new_cp, new_cp_blk_no++);
557 ASSERT(ret >= 0);
558
559 memset(buf, 0, BLOCK_SZ);
560 for (i = 0; i < get_newsb(cp_payload); i++) {
561 ret = dev_write_block(buf, new_cp_blk_no++);
562 ASSERT(ret >= 0);
563 }
564
565 for (i = 0; i < orphan_blks; i++) {
566 block_t orphan_blk_no = old_cp_blk_no + 1 + get_sb(cp_payload);
567
568 ret = dev_read_block(buf, orphan_blk_no++);
569 ASSERT(ret >= 0);
570
571 ret = dev_write_block(buf, new_cp_blk_no++);
572 ASSERT(ret >= 0);
573 }
574
575 /* update summary blocks having nullified journal entries */
576 for (i = 0; i < NO_CHECK_TYPE; i++) {
577 struct curseg_info *curseg = CURSEG_I(sbi, i);
578
579 ret = dev_write_block(curseg->sum_blk, new_cp_blk_no++);
580 ASSERT(ret >= 0);
581 }
582
583 /* write the last cp */
584 ret = dev_write_block(new_cp, new_cp_blk_no++);
585 ASSERT(ret >= 0);
586
587 /* Write nat bits */
588 if (flags & CP_NAT_BITS_FLAG)
589 write_nat_bits(sbi, new_sb, new_cp, sbi->cur_cp == 1 ? 2 : 1);
590
591 /* disable old checkpoint */
592 memset(buf, 0, BLOCK_SZ);
593 ret = dev_write_block(buf, old_cp_blk_no);
594 ASSERT(ret >= 0);
595
596 free(buf);
597 free(new_cp);
598 DBG(0, "Info: Done to rebuild checkpoint blocks\n");
599 }
600
f2fs_resize_check(struct f2fs_sb_info * sbi,struct f2fs_super_block * new_sb)601 static int f2fs_resize_check(struct f2fs_sb_info *sbi, struct f2fs_super_block *new_sb)
602 {
603 struct f2fs_checkpoint *cp = F2FS_CKPT(sbi);
604 block_t user_block_count;
605 unsigned int overprov_segment_count;
606
607 overprov_segment_count = (get_newsb(segment_count_main) -
608 c.new_reserved_segments) *
609 c.new_overprovision / 100;
610 overprov_segment_count += c.new_reserved_segments;
611
612 user_block_count = (get_newsb(segment_count_main) -
613 overprov_segment_count) * c.blks_per_seg;
614
615 if (get_cp(valid_block_count) > user_block_count)
616 return -1;
617
618 return 0;
619 }
620
f2fs_resize_grow(struct f2fs_sb_info * sbi)621 static int f2fs_resize_grow(struct f2fs_sb_info *sbi)
622 {
623 struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
624 struct f2fs_super_block new_sb_raw;
625 struct f2fs_super_block *new_sb = &new_sb_raw;
626 block_t end_blkaddr, old_main_blkaddr, new_main_blkaddr;
627 unsigned int offset;
628 unsigned int offset_seg = 0;
629 int err = -1;
630
631 /* flush NAT/SIT journal entries */
632 flush_journal_entries(sbi);
633
634 memcpy(new_sb, F2FS_RAW_SUPER(sbi), sizeof(*new_sb));
635 if (get_new_sb(new_sb))
636 return -1;
637
638 if (f2fs_resize_check(sbi, new_sb) < 0)
639 return -1;
640
641 /* check nat availability */
642 if (get_sb(segment_count_nat) > get_newsb(segment_count_nat)) {
643 err = shrink_nats(sbi, new_sb);
644 if (err) {
645 MSG(0, "\tError: Failed to shrink NATs\n");
646 return err;
647 }
648 }
649
650 old_main_blkaddr = get_sb(main_blkaddr);
651 new_main_blkaddr = get_newsb(main_blkaddr);
652 offset = new_main_blkaddr - old_main_blkaddr;
653 end_blkaddr = (get_sb(segment_count_main) <<
654 get_sb(log_blocks_per_seg)) + get_sb(main_blkaddr);
655
656 err = -EAGAIN;
657 if (new_main_blkaddr < end_blkaddr) {
658 err = f2fs_defragment(sbi, old_main_blkaddr, offset,
659 new_main_blkaddr, 0);
660 if (!err)
661 offset_seg = offset >> get_sb(log_blocks_per_seg);
662 MSG(0, "Try to do defragement: %s\n", err ? "Skip": "Done");
663 }
664 /* move whole data region */
665 if (err)
666 migrate_main(sbi, offset);
667
668 migrate_ssa(sbi, new_sb, offset_seg);
669 migrate_nat(sbi, new_sb);
670 migrate_sit(sbi, new_sb, offset_seg);
671 rebuild_checkpoint(sbi, new_sb, offset_seg);
672 update_superblock(new_sb, SB_MASK_ALL);
673 print_raw_sb_info(sb);
674 print_raw_sb_info(new_sb);
675
676 return 0;
677 }
678
f2fs_resize_shrink(struct f2fs_sb_info * sbi)679 static int f2fs_resize_shrink(struct f2fs_sb_info *sbi)
680 {
681 struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
682 struct f2fs_super_block new_sb_raw;
683 struct f2fs_super_block *new_sb = &new_sb_raw;
684 block_t old_end_blkaddr, old_main_blkaddr;
685 block_t new_end_blkaddr, new_main_blkaddr, tmp_end_blkaddr;
686 unsigned int offset;
687 int err = -1;
688
689 /* flush NAT/SIT journal entries */
690 flush_journal_entries(sbi);
691
692 memcpy(new_sb, F2FS_RAW_SUPER(sbi), sizeof(*new_sb));
693 if (get_new_sb(new_sb))
694 return -1;
695
696 if (f2fs_resize_check(sbi, new_sb) < 0)
697 return -1;
698
699 /* check nat availability */
700 if (get_sb(segment_count_nat) > get_newsb(segment_count_nat)) {
701 err = shrink_nats(sbi, new_sb);
702 if (err) {
703 MSG(0, "\tError: Failed to shrink NATs\n");
704 return err;
705 }
706 }
707
708 old_main_blkaddr = get_sb(main_blkaddr);
709 new_main_blkaddr = get_newsb(main_blkaddr);
710 offset = old_main_blkaddr - new_main_blkaddr;
711 old_end_blkaddr = (get_sb(segment_count_main) <<
712 get_sb(log_blocks_per_seg)) + get_sb(main_blkaddr);
713 new_end_blkaddr = (get_newsb(segment_count_main) <<
714 get_newsb(log_blocks_per_seg)) + get_newsb(main_blkaddr);
715
716 tmp_end_blkaddr = new_end_blkaddr + offset;
717 err = f2fs_defragment(sbi, tmp_end_blkaddr,
718 old_end_blkaddr - tmp_end_blkaddr,
719 tmp_end_blkaddr, 1);
720 MSG(0, "Try to do defragement: %s\n", err ? "Insufficient Space": "Done");
721
722 if (err) {
723 return -ENOSPC;
724 }
725
726 update_superblock(new_sb, SB_MASK_ALL);
727 rebuild_checkpoint(sbi, new_sb, 0);
728 /*if (!c.safe_resize) {
729 migrate_sit(sbi, new_sb, offset_seg);
730 migrate_nat(sbi, new_sb);
731 migrate_ssa(sbi, new_sb, offset_seg);
732 }*/
733
734 /* move whole data region */
735 //if (err)
736 // migrate_main(sbi, offset);
737 print_raw_sb_info(sb);
738 print_raw_sb_info(new_sb);
739
740 return 0;
741 }
742
f2fs_resize(struct f2fs_sb_info * sbi)743 int f2fs_resize(struct f2fs_sb_info *sbi)
744 {
745 struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
746
747 /* may different sector size */
748 if ((c.target_sectors * c.sector_size >>
749 get_sb(log_blocksize)) < get_sb(block_count))
750 if (!c.safe_resize) {
751 ASSERT_MSG("Nothing to resize, now only supports resizing with safe resize flag\n");
752 return -1;
753 } else {
754 return f2fs_resize_shrink(sbi);
755 }
756 else if (((c.target_sectors * c.sector_size >>
757 get_sb(log_blocksize)) > get_sb(block_count)) ||
758 c.force)
759 return f2fs_resize_grow(sbi);
760 else {
761 MSG(0, "Nothing to resize.\n");
762 return 0;
763 }
764 }
765