Commit | Line | Data |
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7c1a000d | 1 | // SPDX-License-Identifier: GPL-2.0 |
0a8165d7 | 2 | /* |
7bc09003 JK |
3 | * fs/f2fs/gc.c |
4 | * | |
5 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
6 | * http://www.samsung.com/ | |
7bc09003 JK |
7 | */ |
8 | #include <linux/fs.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/backing-dev.h> | |
7bc09003 JK |
11 | #include <linux/init.h> |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/kthread.h> | |
14 | #include <linux/delay.h> | |
15 | #include <linux/freezer.h> | |
7bc09003 JK |
16 | |
17 | #include "f2fs.h" | |
18 | #include "node.h" | |
19 | #include "segment.h" | |
20 | #include "gc.h" | |
8e46b3ed | 21 | #include <trace/events/f2fs.h> |
7bc09003 | 22 | |
7bc09003 JK |
23 | static int gc_thread_func(void *data) |
24 | { | |
25 | struct f2fs_sb_info *sbi = data; | |
b59d0bae | 26 | struct f2fs_gc_kthread *gc_th = sbi->gc_thread; |
7bc09003 | 27 | wait_queue_head_t *wq = &sbi->gc_thread->gc_wait_queue_head; |
b8c502b8 | 28 | unsigned int wait_ms; |
7bc09003 | 29 | |
b59d0bae | 30 | wait_ms = gc_th->min_sleep_time; |
7bc09003 | 31 | |
1d7be270 | 32 | set_freezable(); |
7bc09003 | 33 | do { |
bbbc34fd CY |
34 | bool sync_mode; |
35 | ||
1d7be270 | 36 | wait_event_interruptible_timeout(*wq, |
d9872a69 JK |
37 | kthread_should_stop() || freezing(current) || |
38 | gc_th->gc_wake, | |
1d7be270 JK |
39 | msecs_to_jiffies(wait_ms)); |
40 | ||
d9872a69 JK |
41 | /* give it a try one time */ |
42 | if (gc_th->gc_wake) | |
43 | gc_th->gc_wake = 0; | |
44 | ||
274bd9ba CY |
45 | if (try_to_freeze()) { |
46 | stat_other_skip_bggc_count(sbi); | |
7bc09003 | 47 | continue; |
274bd9ba | 48 | } |
7bc09003 JK |
49 | if (kthread_should_stop()) |
50 | break; | |
51 | ||
d6212a5f | 52 | if (sbi->sb->s_writers.frozen >= SB_FREEZE_WRITE) { |
88dd8934 | 53 | increase_sleep_time(gc_th, &wait_ms); |
274bd9ba | 54 | stat_other_skip_bggc_count(sbi); |
d6212a5f CL |
55 | continue; |
56 | } | |
57 | ||
55523519 | 58 | if (time_to_inject(sbi, FAULT_CHECKPOINT)) { |
c45d6002 | 59 | f2fs_show_injection_info(sbi, FAULT_CHECKPOINT); |
0f348028 | 60 | f2fs_stop_checkpoint(sbi, false); |
55523519 | 61 | } |
0f348028 | 62 | |
274bd9ba CY |
63 | if (!sb_start_write_trylock(sbi->sb)) { |
64 | stat_other_skip_bggc_count(sbi); | |
dc6febb6 | 65 | continue; |
274bd9ba | 66 | } |
dc6febb6 | 67 | |
7bc09003 JK |
68 | /* |
69 | * [GC triggering condition] | |
70 | * 0. GC is not conducted currently. | |
71 | * 1. There are enough dirty segments. | |
72 | * 2. IO subsystem is idle by checking the # of writeback pages. | |
73 | * 3. IO subsystem is idle by checking the # of requests in | |
74 | * bdev's request list. | |
75 | * | |
e1c42045 | 76 | * Note) We have to avoid triggering GCs frequently. |
7bc09003 JK |
77 | * Because it is possible that some segments can be |
78 | * invalidated soon after by user update or deletion. | |
79 | * So, I'd like to wait some time to collect dirty segments. | |
80 | */ | |
5b0e9539 | 81 | if (sbi->gc_mode == GC_URGENT) { |
d9872a69 | 82 | wait_ms = gc_th->urgent_sleep_time; |
fb24fea7 | 83 | down_write(&sbi->gc_lock); |
d9872a69 JK |
84 | goto do_gc; |
85 | } | |
86 | ||
fb24fea7 | 87 | if (!down_write_trylock(&sbi->gc_lock)) { |
274bd9ba | 88 | stat_other_skip_bggc_count(sbi); |
69babac0 | 89 | goto next; |
274bd9ba | 90 | } |
69babac0 | 91 | |
a7d10cf3 | 92 | if (!is_idle(sbi, GC_TIME)) { |
88dd8934 | 93 | increase_sleep_time(gc_th, &wait_ms); |
fb24fea7 | 94 | up_write(&sbi->gc_lock); |
274bd9ba | 95 | stat_io_skip_bggc_count(sbi); |
dc6febb6 | 96 | goto next; |
7bc09003 JK |
97 | } |
98 | ||
99 | if (has_enough_invalid_blocks(sbi)) | |
88dd8934 | 100 | decrease_sleep_time(gc_th, &wait_ms); |
7bc09003 | 101 | else |
88dd8934 | 102 | increase_sleep_time(gc_th, &wait_ms); |
d9872a69 | 103 | do_gc: |
fc7100ea | 104 | stat_inc_bggc_count(sbi->stat_info); |
7bc09003 | 105 | |
bbbc34fd CY |
106 | sync_mode = F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC; |
107 | ||
43727527 | 108 | /* if return value is not zero, no victim was selected */ |
bbbc34fd | 109 | if (f2fs_gc(sbi, sync_mode, true, NULL_SEGNO)) |
b59d0bae | 110 | wait_ms = gc_th->no_gc_sleep_time; |
81eb8d6e | 111 | |
84e4214f JK |
112 | trace_f2fs_background_gc(sbi->sb, wait_ms, |
113 | prefree_segments(sbi), free_segments(sbi)); | |
114 | ||
4660f9c0 | 115 | /* balancing f2fs's metadata periodically */ |
7bcd0cfa | 116 | f2fs_balance_fs_bg(sbi, true); |
dc6febb6 CY |
117 | next: |
118 | sb_end_write(sbi->sb); | |
81eb8d6e | 119 | |
7bc09003 JK |
120 | } while (!kthread_should_stop()); |
121 | return 0; | |
122 | } | |
123 | ||
4d57b86d | 124 | int f2fs_start_gc_thread(struct f2fs_sb_info *sbi) |
7bc09003 | 125 | { |
1042d60f | 126 | struct f2fs_gc_kthread *gc_th; |
ec7b1f2d | 127 | dev_t dev = sbi->sb->s_bdev->bd_dev; |
7a267f8d | 128 | int err = 0; |
7bc09003 | 129 | |
1ecc0c5c | 130 | gc_th = f2fs_kmalloc(sbi, sizeof(struct f2fs_gc_kthread), GFP_KERNEL); |
7a267f8d NJ |
131 | if (!gc_th) { |
132 | err = -ENOMEM; | |
133 | goto out; | |
134 | } | |
7bc09003 | 135 | |
d9872a69 | 136 | gc_th->urgent_sleep_time = DEF_GC_THREAD_URGENT_SLEEP_TIME; |
b59d0bae NJ |
137 | gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME; |
138 | gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME; | |
139 | gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME; | |
140 | ||
d9872a69 | 141 | gc_th->gc_wake= 0; |
d2dc095f | 142 | |
7bc09003 JK |
143 | sbi->gc_thread = gc_th; |
144 | init_waitqueue_head(&sbi->gc_thread->gc_wait_queue_head); | |
145 | sbi->gc_thread->f2fs_gc_task = kthread_run(gc_thread_func, sbi, | |
ec7b1f2d | 146 | "f2fs_gc-%u:%u", MAJOR(dev), MINOR(dev)); |
7bc09003 | 147 | if (IS_ERR(gc_th->f2fs_gc_task)) { |
7a267f8d | 148 | err = PTR_ERR(gc_th->f2fs_gc_task); |
5222595d | 149 | kvfree(gc_th); |
25718423 | 150 | sbi->gc_thread = NULL; |
7bc09003 | 151 | } |
7a267f8d NJ |
152 | out: |
153 | return err; | |
7bc09003 JK |
154 | } |
155 | ||
4d57b86d | 156 | void f2fs_stop_gc_thread(struct f2fs_sb_info *sbi) |
7bc09003 JK |
157 | { |
158 | struct f2fs_gc_kthread *gc_th = sbi->gc_thread; | |
159 | if (!gc_th) | |
160 | return; | |
161 | kthread_stop(gc_th->f2fs_gc_task); | |
5222595d | 162 | kvfree(gc_th); |
7bc09003 JK |
163 | sbi->gc_thread = NULL; |
164 | } | |
165 | ||
5b0e9539 | 166 | static int select_gc_type(struct f2fs_sb_info *sbi, int gc_type) |
7bc09003 | 167 | { |
d2dc095f NJ |
168 | int gc_mode = (gc_type == BG_GC) ? GC_CB : GC_GREEDY; |
169 | ||
5b0e9539 JK |
170 | switch (sbi->gc_mode) { |
171 | case GC_IDLE_CB: | |
172 | gc_mode = GC_CB; | |
173 | break; | |
174 | case GC_IDLE_GREEDY: | |
175 | case GC_URGENT: | |
b27bc809 | 176 | gc_mode = GC_GREEDY; |
5b0e9539 JK |
177 | break; |
178 | } | |
d2dc095f | 179 | return gc_mode; |
7bc09003 JK |
180 | } |
181 | ||
182 | static void select_policy(struct f2fs_sb_info *sbi, int gc_type, | |
183 | int type, struct victim_sel_policy *p) | |
184 | { | |
185 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
186 | ||
4ebefc44 | 187 | if (p->alloc_mode == SSR) { |
7bc09003 JK |
188 | p->gc_mode = GC_GREEDY; |
189 | p->dirty_segmap = dirty_i->dirty_segmap[type]; | |
a26b7c8a | 190 | p->max_search = dirty_i->nr_dirty[type]; |
7bc09003 JK |
191 | p->ofs_unit = 1; |
192 | } else { | |
5b0e9539 | 193 | p->gc_mode = select_gc_type(sbi, gc_type); |
7bc09003 | 194 | p->dirty_segmap = dirty_i->dirty_segmap[DIRTY]; |
a26b7c8a | 195 | p->max_search = dirty_i->nr_dirty[DIRTY]; |
7bc09003 JK |
196 | p->ofs_unit = sbi->segs_per_sec; |
197 | } | |
a26b7c8a | 198 | |
7a88ddb5 CY |
199 | /* |
200 | * adjust candidates range, should select all dirty segments for | |
201 | * foreground GC and urgent GC cases. | |
202 | */ | |
b27bc809 | 203 | if (gc_type != FG_GC && |
5b0e9539 | 204 | (sbi->gc_mode != GC_URGENT) && |
b27bc809 | 205 | p->max_search > sbi->max_victim_search) |
b1c57c1c | 206 | p->max_search = sbi->max_victim_search; |
a26b7c8a | 207 | |
b94929d9 YS |
208 | /* let's select beginning hot/small space first in no_heap mode*/ |
209 | if (test_opt(sbi, NOHEAP) && | |
210 | (type == CURSEG_HOT_DATA || IS_NODESEG(type))) | |
7a20b8a6 JK |
211 | p->offset = 0; |
212 | else | |
e066b83c | 213 | p->offset = SIT_I(sbi)->last_victim[p->gc_mode]; |
7bc09003 JK |
214 | } |
215 | ||
216 | static unsigned int get_max_cost(struct f2fs_sb_info *sbi, | |
217 | struct victim_sel_policy *p) | |
218 | { | |
b7250d2d JK |
219 | /* SSR allocates in a segment unit */ |
220 | if (p->alloc_mode == SSR) | |
3519e3f9 | 221 | return sbi->blocks_per_seg; |
7bc09003 | 222 | if (p->gc_mode == GC_GREEDY) |
c541a51b | 223 | return 2 * sbi->blocks_per_seg * p->ofs_unit; |
7bc09003 JK |
224 | else if (p->gc_mode == GC_CB) |
225 | return UINT_MAX; | |
226 | else /* No other gc_mode */ | |
227 | return 0; | |
228 | } | |
229 | ||
230 | static unsigned int check_bg_victims(struct f2fs_sb_info *sbi) | |
231 | { | |
232 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
5ec4e49f | 233 | unsigned int secno; |
7bc09003 JK |
234 | |
235 | /* | |
236 | * If the gc_type is FG_GC, we can select victim segments | |
237 | * selected by background GC before. | |
238 | * Those segments guarantee they have small valid blocks. | |
239 | */ | |
7cd8558b | 240 | for_each_set_bit(secno, dirty_i->victim_secmap, MAIN_SECS(sbi)) { |
5ec4e49f | 241 | if (sec_usage_check(sbi, secno)) |
b65ee148 | 242 | continue; |
5ec4e49f | 243 | clear_bit(secno, dirty_i->victim_secmap); |
4ddb1a4d | 244 | return GET_SEG_FROM_SEC(sbi, secno); |
7bc09003 JK |
245 | } |
246 | return NULL_SEGNO; | |
247 | } | |
248 | ||
249 | static unsigned int get_cb_cost(struct f2fs_sb_info *sbi, unsigned int segno) | |
250 | { | |
251 | struct sit_info *sit_i = SIT_I(sbi); | |
4ddb1a4d JK |
252 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); |
253 | unsigned int start = GET_SEG_FROM_SEC(sbi, secno); | |
7bc09003 JK |
254 | unsigned long long mtime = 0; |
255 | unsigned int vblocks; | |
256 | unsigned char age = 0; | |
257 | unsigned char u; | |
258 | unsigned int i; | |
259 | ||
260 | for (i = 0; i < sbi->segs_per_sec; i++) | |
261 | mtime += get_seg_entry(sbi, start + i)->mtime; | |
302bd348 | 262 | vblocks = get_valid_blocks(sbi, segno, true); |
7bc09003 JK |
263 | |
264 | mtime = div_u64(mtime, sbi->segs_per_sec); | |
265 | vblocks = div_u64(vblocks, sbi->segs_per_sec); | |
266 | ||
267 | u = (vblocks * 100) >> sbi->log_blocks_per_seg; | |
268 | ||
e1c42045 | 269 | /* Handle if the system time has changed by the user */ |
7bc09003 JK |
270 | if (mtime < sit_i->min_mtime) |
271 | sit_i->min_mtime = mtime; | |
272 | if (mtime > sit_i->max_mtime) | |
273 | sit_i->max_mtime = mtime; | |
274 | if (sit_i->max_mtime != sit_i->min_mtime) | |
275 | age = 100 - div64_u64(100 * (mtime - sit_i->min_mtime), | |
276 | sit_i->max_mtime - sit_i->min_mtime); | |
277 | ||
278 | return UINT_MAX - ((100 * (100 - u) * age) / (100 + u)); | |
279 | } | |
280 | ||
a57e564d JX |
281 | static inline unsigned int get_gc_cost(struct f2fs_sb_info *sbi, |
282 | unsigned int segno, struct victim_sel_policy *p) | |
7bc09003 JK |
283 | { |
284 | if (p->alloc_mode == SSR) | |
2afce76a | 285 | return get_seg_entry(sbi, segno)->ckpt_valid_blocks; |
7bc09003 JK |
286 | |
287 | /* alloc_mode == LFS */ | |
288 | if (p->gc_mode == GC_GREEDY) | |
91f4382b | 289 | return get_valid_blocks(sbi, segno, true); |
7bc09003 JK |
290 | else |
291 | return get_cb_cost(sbi, segno); | |
292 | } | |
293 | ||
688159b6 FL |
294 | static unsigned int count_bits(const unsigned long *addr, |
295 | unsigned int offset, unsigned int len) | |
296 | { | |
297 | unsigned int end = offset + len, sum = 0; | |
298 | ||
299 | while (offset < end) { | |
300 | if (test_bit(offset++, addr)) | |
301 | ++sum; | |
302 | } | |
303 | return sum; | |
304 | } | |
305 | ||
0a8165d7 | 306 | /* |
111d2495 | 307 | * This function is called from two paths. |
7bc09003 JK |
308 | * One is garbage collection and the other is SSR segment selection. |
309 | * When it is called during GC, it just gets a victim segment | |
310 | * and it does not remove it from dirty seglist. | |
311 | * When it is called from SSR segment selection, it finds a segment | |
312 | * which has minimum valid blocks and removes it from dirty seglist. | |
313 | */ | |
314 | static int get_victim_by_default(struct f2fs_sb_info *sbi, | |
315 | unsigned int *result, int gc_type, int type, char alloc_mode) | |
316 | { | |
317 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
e066b83c | 318 | struct sit_info *sm = SIT_I(sbi); |
7bc09003 | 319 | struct victim_sel_policy p; |
3fa56503 | 320 | unsigned int secno, last_victim; |
04f0b2ea | 321 | unsigned int last_segment; |
688159b6 | 322 | unsigned int nsearched = 0; |
7bc09003 | 323 | |
210f41bc | 324 | mutex_lock(&dirty_i->seglist_lock); |
04f0b2ea | 325 | last_segment = MAIN_SECS(sbi) * sbi->segs_per_sec; |
210f41bc | 326 | |
7bc09003 JK |
327 | p.alloc_mode = alloc_mode; |
328 | select_policy(sbi, gc_type, type, &p); | |
329 | ||
330 | p.min_segno = NULL_SEGNO; | |
3fa56503 | 331 | p.min_cost = get_max_cost(sbi, &p); |
7bc09003 | 332 | |
e066b83c | 333 | if (*result != NULL_SEGNO) { |
08ac9a38 | 334 | if (get_valid_blocks(sbi, *result, false) && |
e066b83c JK |
335 | !sec_usage_check(sbi, GET_SEC_FROM_SEG(sbi, *result))) |
336 | p.min_segno = *result; | |
337 | goto out; | |
338 | } | |
339 | ||
3342bb30 CY |
340 | if (p.max_search == 0) |
341 | goto out; | |
342 | ||
e3080b01 CY |
343 | if (__is_large_section(sbi) && p.alloc_mode == LFS) { |
344 | if (sbi->next_victim_seg[BG_GC] != NULL_SEGNO) { | |
345 | p.min_segno = sbi->next_victim_seg[BG_GC]; | |
346 | *result = p.min_segno; | |
347 | sbi->next_victim_seg[BG_GC] = NULL_SEGNO; | |
348 | goto got_result; | |
349 | } | |
350 | if (gc_type == FG_GC && | |
351 | sbi->next_victim_seg[FG_GC] != NULL_SEGNO) { | |
352 | p.min_segno = sbi->next_victim_seg[FG_GC]; | |
353 | *result = p.min_segno; | |
354 | sbi->next_victim_seg[FG_GC] = NULL_SEGNO; | |
355 | goto got_result; | |
356 | } | |
357 | } | |
358 | ||
e066b83c | 359 | last_victim = sm->last_victim[p.gc_mode]; |
7bc09003 JK |
360 | if (p.alloc_mode == LFS && gc_type == FG_GC) { |
361 | p.min_segno = check_bg_victims(sbi); | |
362 | if (p.min_segno != NULL_SEGNO) | |
363 | goto got_it; | |
364 | } | |
365 | ||
366 | while (1) { | |
367 | unsigned long cost; | |
5ec4e49f | 368 | unsigned int segno; |
7bc09003 | 369 | |
a43f7ec3 CY |
370 | segno = find_next_bit(p.dirty_segmap, last_segment, p.offset); |
371 | if (segno >= last_segment) { | |
e066b83c JK |
372 | if (sm->last_victim[p.gc_mode]) { |
373 | last_segment = | |
374 | sm->last_victim[p.gc_mode]; | |
375 | sm->last_victim[p.gc_mode] = 0; | |
7bc09003 JK |
376 | p.offset = 0; |
377 | continue; | |
378 | } | |
379 | break; | |
380 | } | |
a57e564d JX |
381 | |
382 | p.offset = segno + p.ofs_unit; | |
688159b6 | 383 | if (p.ofs_unit > 1) { |
a57e564d | 384 | p.offset -= segno % p.ofs_unit; |
688159b6 FL |
385 | nsearched += count_bits(p.dirty_segmap, |
386 | p.offset - p.ofs_unit, | |
387 | p.ofs_unit); | |
388 | } else { | |
389 | nsearched++; | |
390 | } | |
391 | ||
bbf9f7d9 ST |
392 | #ifdef CONFIG_F2FS_CHECK_FS |
393 | /* | |
394 | * skip selecting the invalid segno (that is failed due to block | |
395 | * validity check failure during GC) to avoid endless GC loop in | |
396 | * such cases. | |
397 | */ | |
398 | if (test_bit(segno, sm->invalid_segmap)) | |
399 | goto next; | |
400 | #endif | |
401 | ||
4ddb1a4d | 402 | secno = GET_SEC_FROM_SEG(sbi, segno); |
7bc09003 | 403 | |
5ec4e49f | 404 | if (sec_usage_check(sbi, secno)) |
688159b6 | 405 | goto next; |
4354994f DR |
406 | /* Don't touch checkpointed data */ |
407 | if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) && | |
49dd883c JK |
408 | get_ckpt_valid_blocks(sbi, segno) && |
409 | p.alloc_mode != SSR)) | |
4354994f | 410 | goto next; |
5ec4e49f | 411 | if (gc_type == BG_GC && test_bit(secno, dirty_i->victim_secmap)) |
688159b6 | 412 | goto next; |
7bc09003 JK |
413 | |
414 | cost = get_gc_cost(sbi, segno, &p); | |
415 | ||
416 | if (p.min_cost > cost) { | |
417 | p.min_segno = segno; | |
418 | p.min_cost = cost; | |
a57e564d | 419 | } |
688159b6 FL |
420 | next: |
421 | if (nsearched >= p.max_search) { | |
e066b83c JK |
422 | if (!sm->last_victim[p.gc_mode] && segno <= last_victim) |
423 | sm->last_victim[p.gc_mode] = last_victim + 1; | |
4ce53776 | 424 | else |
e066b83c | 425 | sm->last_victim[p.gc_mode] = segno + 1; |
04f0b2ea QS |
426 | sm->last_victim[p.gc_mode] %= |
427 | (MAIN_SECS(sbi) * sbi->segs_per_sec); | |
7bc09003 JK |
428 | break; |
429 | } | |
430 | } | |
7bc09003 | 431 | if (p.min_segno != NULL_SEGNO) { |
b2b3460a | 432 | got_it: |
e3080b01 CY |
433 | *result = (p.min_segno / p.ofs_unit) * p.ofs_unit; |
434 | got_result: | |
7bc09003 | 435 | if (p.alloc_mode == LFS) { |
4ddb1a4d | 436 | secno = GET_SEC_FROM_SEG(sbi, p.min_segno); |
5ec4e49f JK |
437 | if (gc_type == FG_GC) |
438 | sbi->cur_victim_sec = secno; | |
439 | else | |
440 | set_bit(secno, dirty_i->victim_secmap); | |
7bc09003 | 441 | } |
8e46b3ed | 442 | |
e3c59108 ST |
443 | } |
444 | out: | |
445 | if (p.min_segno != NULL_SEGNO) | |
8e46b3ed NJ |
446 | trace_f2fs_get_victim(sbi->sb, type, gc_type, &p, |
447 | sbi->cur_victim_sec, | |
448 | prefree_segments(sbi), free_segments(sbi)); | |
7bc09003 JK |
449 | mutex_unlock(&dirty_i->seglist_lock); |
450 | ||
451 | return (p.min_segno == NULL_SEGNO) ? 0 : 1; | |
452 | } | |
453 | ||
454 | static const struct victim_selection default_v_ops = { | |
455 | .get_victim = get_victim_by_default, | |
456 | }; | |
457 | ||
7dda2af8 | 458 | static struct inode *find_gc_inode(struct gc_inode_list *gc_list, nid_t ino) |
7bc09003 | 459 | { |
7bc09003 JK |
460 | struct inode_entry *ie; |
461 | ||
7dda2af8 CL |
462 | ie = radix_tree_lookup(&gc_list->iroot, ino); |
463 | if (ie) | |
464 | return ie->inode; | |
7bc09003 JK |
465 | return NULL; |
466 | } | |
467 | ||
7dda2af8 | 468 | static void add_gc_inode(struct gc_inode_list *gc_list, struct inode *inode) |
7bc09003 | 469 | { |
6cc4af56 GZ |
470 | struct inode_entry *new_ie; |
471 | ||
7dda2af8 | 472 | if (inode == find_gc_inode(gc_list, inode->i_ino)) { |
6cc4af56 GZ |
473 | iput(inode); |
474 | return; | |
7bc09003 | 475 | } |
4d57b86d | 476 | new_ie = f2fs_kmem_cache_alloc(f2fs_inode_entry_slab, GFP_NOFS); |
7bc09003 | 477 | new_ie->inode = inode; |
f28e5034 CY |
478 | |
479 | f2fs_radix_tree_insert(&gc_list->iroot, inode->i_ino, new_ie); | |
7dda2af8 | 480 | list_add_tail(&new_ie->list, &gc_list->ilist); |
7bc09003 JK |
481 | } |
482 | ||
7dda2af8 | 483 | static void put_gc_inode(struct gc_inode_list *gc_list) |
7bc09003 JK |
484 | { |
485 | struct inode_entry *ie, *next_ie; | |
7dda2af8 CL |
486 | list_for_each_entry_safe(ie, next_ie, &gc_list->ilist, list) { |
487 | radix_tree_delete(&gc_list->iroot, ie->inode->i_ino); | |
7bc09003 JK |
488 | iput(ie->inode); |
489 | list_del(&ie->list); | |
4d57b86d | 490 | kmem_cache_free(f2fs_inode_entry_slab, ie); |
7bc09003 JK |
491 | } |
492 | } | |
493 | ||
494 | static int check_valid_map(struct f2fs_sb_info *sbi, | |
495 | unsigned int segno, int offset) | |
496 | { | |
497 | struct sit_info *sit_i = SIT_I(sbi); | |
498 | struct seg_entry *sentry; | |
499 | int ret; | |
500 | ||
3d26fa6b | 501 | down_read(&sit_i->sentry_lock); |
7bc09003 JK |
502 | sentry = get_seg_entry(sbi, segno); |
503 | ret = f2fs_test_bit(offset, sentry->cur_valid_map); | |
3d26fa6b | 504 | up_read(&sit_i->sentry_lock); |
43727527 | 505 | return ret; |
7bc09003 JK |
506 | } |
507 | ||
0a8165d7 | 508 | /* |
7bc09003 JK |
509 | * This function compares node address got in summary with that in NAT. |
510 | * On validity, copy that node with cold status, otherwise (invalid node) | |
511 | * ignore that. | |
512 | */ | |
48018b4c | 513 | static int gc_node_segment(struct f2fs_sb_info *sbi, |
7bc09003 JK |
514 | struct f2fs_summary *sum, unsigned int segno, int gc_type) |
515 | { | |
7bc09003 | 516 | struct f2fs_summary *entry; |
26d58599 | 517 | block_t start_addr; |
7bc09003 | 518 | int off; |
7ea984b0 | 519 | int phase = 0; |
c29fd0c0 | 520 | bool fggc = (gc_type == FG_GC); |
48018b4c | 521 | int submitted = 0; |
7bc09003 | 522 | |
26d58599 JK |
523 | start_addr = START_BLOCK(sbi, segno); |
524 | ||
7bc09003 JK |
525 | next_step: |
526 | entry = sum; | |
c718379b | 527 | |
c29fd0c0 CY |
528 | if (fggc && phase == 2) |
529 | atomic_inc(&sbi->wb_sync_req[NODE]); | |
530 | ||
7bc09003 JK |
531 | for (off = 0; off < sbi->blocks_per_seg; off++, entry++) { |
532 | nid_t nid = le32_to_cpu(entry->nid); | |
533 | struct page *node_page; | |
26d58599 | 534 | struct node_info ni; |
48018b4c | 535 | int err; |
7bc09003 | 536 | |
43727527 | 537 | /* stop BG_GC if there is not enough free sections. */ |
7f3037a5 | 538 | if (gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) |
48018b4c | 539 | return submitted; |
7bc09003 | 540 | |
43727527 | 541 | if (check_valid_map(sbi, segno, off) == 0) |
7bc09003 JK |
542 | continue; |
543 | ||
7ea984b0 | 544 | if (phase == 0) { |
4d57b86d | 545 | f2fs_ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), 1, |
7ea984b0 CY |
546 | META_NAT, true); |
547 | continue; | |
548 | } | |
549 | ||
550 | if (phase == 1) { | |
4d57b86d | 551 | f2fs_ra_node_page(sbi, nid); |
7bc09003 JK |
552 | continue; |
553 | } | |
7ea984b0 CY |
554 | |
555 | /* phase == 2 */ | |
4d57b86d | 556 | node_page = f2fs_get_node_page(sbi, nid); |
7bc09003 JK |
557 | if (IS_ERR(node_page)) |
558 | continue; | |
559 | ||
4d57b86d | 560 | /* block may become invalid during f2fs_get_node_page */ |
9a01b56b HY |
561 | if (check_valid_map(sbi, segno, off) == 0) { |
562 | f2fs_put_page(node_page, 1); | |
563 | continue; | |
26d58599 JK |
564 | } |
565 | ||
7735730d CY |
566 | if (f2fs_get_node_info(sbi, nid, &ni)) { |
567 | f2fs_put_page(node_page, 1); | |
568 | continue; | |
569 | } | |
570 | ||
26d58599 JK |
571 | if (ni.blk_addr != start_addr + off) { |
572 | f2fs_put_page(node_page, 1); | |
573 | continue; | |
9a01b56b HY |
574 | } |
575 | ||
48018b4c CY |
576 | err = f2fs_move_node_page(node_page, gc_type); |
577 | if (!err && gc_type == FG_GC) | |
578 | submitted++; | |
e1235983 | 579 | stat_inc_node_blk_count(sbi, 1, gc_type); |
7bc09003 | 580 | } |
c718379b | 581 | |
7ea984b0 | 582 | if (++phase < 3) |
7bc09003 | 583 | goto next_step; |
c29fd0c0 CY |
584 | |
585 | if (fggc) | |
586 | atomic_dec(&sbi->wb_sync_req[NODE]); | |
48018b4c | 587 | return submitted; |
7bc09003 JK |
588 | } |
589 | ||
0a8165d7 | 590 | /* |
9af45ef5 JK |
591 | * Calculate start block index indicating the given node offset. |
592 | * Be careful, caller should give this node offset only indicating direct node | |
593 | * blocks. If any node offsets, which point the other types of node blocks such | |
594 | * as indirect or double indirect node blocks, are given, it must be a caller's | |
595 | * bug. | |
7bc09003 | 596 | */ |
4d57b86d | 597 | block_t f2fs_start_bidx_of_node(unsigned int node_ofs, struct inode *inode) |
7bc09003 | 598 | { |
ce19a5d4 JK |
599 | unsigned int indirect_blks = 2 * NIDS_PER_BLOCK + 4; |
600 | unsigned int bidx; | |
7bc09003 | 601 | |
ce19a5d4 JK |
602 | if (node_ofs == 0) |
603 | return 0; | |
7bc09003 | 604 | |
ce19a5d4 | 605 | if (node_ofs <= 2) { |
7bc09003 JK |
606 | bidx = node_ofs - 1; |
607 | } else if (node_ofs <= indirect_blks) { | |
ce19a5d4 | 608 | int dec = (node_ofs - 4) / (NIDS_PER_BLOCK + 1); |
7bc09003 JK |
609 | bidx = node_ofs - 2 - dec; |
610 | } else { | |
ce19a5d4 | 611 | int dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1); |
7bc09003 JK |
612 | bidx = node_ofs - 5 - dec; |
613 | } | |
d02a6e61 | 614 | return bidx * ADDRS_PER_BLOCK(inode) + ADDRS_PER_INODE(inode); |
7bc09003 JK |
615 | } |
616 | ||
c1079892 | 617 | static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, |
7bc09003 JK |
618 | struct node_info *dni, block_t blkaddr, unsigned int *nofs) |
619 | { | |
620 | struct page *node_page; | |
621 | nid_t nid; | |
622 | unsigned int ofs_in_node; | |
623 | block_t source_blkaddr; | |
624 | ||
625 | nid = le32_to_cpu(sum->nid); | |
626 | ofs_in_node = le16_to_cpu(sum->ofs_in_node); | |
627 | ||
4d57b86d | 628 | node_page = f2fs_get_node_page(sbi, nid); |
7bc09003 | 629 | if (IS_ERR(node_page)) |
c1079892 | 630 | return false; |
7bc09003 | 631 | |
7735730d CY |
632 | if (f2fs_get_node_info(sbi, nid, dni)) { |
633 | f2fs_put_page(node_page, 1); | |
634 | return false; | |
635 | } | |
7bc09003 JK |
636 | |
637 | if (sum->version != dni->version) { | |
dcbb4c10 JP |
638 | f2fs_warn(sbi, "%s: valid data with mismatched node version.", |
639 | __func__); | |
c13ff37e | 640 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
7bc09003 JK |
641 | } |
642 | ||
643 | *nofs = ofs_of_node(node_page); | |
a2ced1ce | 644 | source_blkaddr = data_blkaddr(NULL, node_page, ofs_in_node); |
7bc09003 JK |
645 | f2fs_put_page(node_page, 1); |
646 | ||
bbf9f7d9 ST |
647 | if (source_blkaddr != blkaddr) { |
648 | #ifdef CONFIG_F2FS_CHECK_FS | |
649 | unsigned int segno = GET_SEGNO(sbi, blkaddr); | |
650 | unsigned long offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); | |
651 | ||
652 | if (unlikely(check_valid_map(sbi, segno, offset))) { | |
653 | if (!test_and_set_bit(segno, SIT_I(sbi)->invalid_segmap)) { | |
654 | f2fs_err(sbi, "mismatched blkaddr %u (source_blkaddr %u) in seg %u\n", | |
655 | blkaddr, source_blkaddr, segno); | |
656 | f2fs_bug_on(sbi, 1); | |
657 | } | |
658 | } | |
659 | #endif | |
c1079892 | 660 | return false; |
bbf9f7d9 | 661 | } |
c1079892 | 662 | return true; |
7bc09003 JK |
663 | } |
664 | ||
6aa58d8a CY |
665 | static int ra_data_block(struct inode *inode, pgoff_t index) |
666 | { | |
667 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
668 | struct address_space *mapping = inode->i_mapping; | |
669 | struct dnode_of_data dn; | |
670 | struct page *page; | |
671 | struct extent_info ei = {0, 0, 0}; | |
672 | struct f2fs_io_info fio = { | |
673 | .sbi = sbi, | |
674 | .ino = inode->i_ino, | |
675 | .type = DATA, | |
676 | .temp = COLD, | |
677 | .op = REQ_OP_READ, | |
678 | .op_flags = 0, | |
679 | .encrypted_page = NULL, | |
680 | .in_list = false, | |
681 | .retry = false, | |
682 | }; | |
683 | int err; | |
684 | ||
685 | page = f2fs_grab_cache_page(mapping, index, true); | |
686 | if (!page) | |
687 | return -ENOMEM; | |
688 | ||
689 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
690 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
93770ab7 CY |
691 | if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr, |
692 | DATA_GENERIC_ENHANCE_READ))) { | |
10f966bb | 693 | err = -EFSCORRUPTED; |
93770ab7 CY |
694 | goto put_page; |
695 | } | |
6aa58d8a CY |
696 | goto got_it; |
697 | } | |
698 | ||
699 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
700 | err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
701 | if (err) | |
702 | goto put_page; | |
703 | f2fs_put_dnode(&dn); | |
704 | ||
93770ab7 CY |
705 | if (!__is_valid_data_blkaddr(dn.data_blkaddr)) { |
706 | err = -ENOENT; | |
707 | goto put_page; | |
708 | } | |
6aa58d8a | 709 | if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr, |
93770ab7 | 710 | DATA_GENERIC_ENHANCE))) { |
10f966bb | 711 | err = -EFSCORRUPTED; |
6aa58d8a CY |
712 | goto put_page; |
713 | } | |
714 | got_it: | |
715 | /* read page */ | |
716 | fio.page = page; | |
717 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; | |
718 | ||
9bf1a3f7 YS |
719 | /* |
720 | * don't cache encrypted data into meta inode until previous dirty | |
721 | * data were writebacked to avoid racing between GC and flush. | |
722 | */ | |
bae0ee7a | 723 | f2fs_wait_on_page_writeback(page, DATA, true, true); |
9bf1a3f7 YS |
724 | |
725 | f2fs_wait_on_block_writeback(inode, dn.data_blkaddr); | |
726 | ||
6aa58d8a CY |
727 | fio.encrypted_page = f2fs_pagecache_get_page(META_MAPPING(sbi), |
728 | dn.data_blkaddr, | |
729 | FGP_LOCK | FGP_CREAT, GFP_NOFS); | |
730 | if (!fio.encrypted_page) { | |
731 | err = -ENOMEM; | |
732 | goto put_page; | |
733 | } | |
734 | ||
735 | err = f2fs_submit_page_bio(&fio); | |
736 | if (err) | |
737 | goto put_encrypted_page; | |
738 | f2fs_put_page(fio.encrypted_page, 0); | |
739 | f2fs_put_page(page, 1); | |
740 | return 0; | |
741 | put_encrypted_page: | |
742 | f2fs_put_page(fio.encrypted_page, 1); | |
743 | put_page: | |
744 | f2fs_put_page(page, 1); | |
745 | return err; | |
746 | } | |
747 | ||
d4c759ee JK |
748 | /* |
749 | * Move data block via META_MAPPING while keeping locked data page. | |
750 | * This can be used to move blocks, aka LBAs, directly on disk. | |
751 | */ | |
48018b4c | 752 | static int move_data_block(struct inode *inode, block_t bidx, |
2ef79ecb | 753 | int gc_type, unsigned int segno, int off) |
4375a336 JK |
754 | { |
755 | struct f2fs_io_info fio = { | |
756 | .sbi = F2FS_I_SB(inode), | |
39d787be | 757 | .ino = inode->i_ino, |
4375a336 | 758 | .type = DATA, |
a912b54d | 759 | .temp = COLD, |
04d328de | 760 | .op = REQ_OP_READ, |
70fd7614 | 761 | .op_flags = 0, |
4375a336 | 762 | .encrypted_page = NULL, |
fb830fc5 | 763 | .in_list = false, |
fe16efe6 | 764 | .retry = false, |
4375a336 JK |
765 | }; |
766 | struct dnode_of_data dn; | |
767 | struct f2fs_summary sum; | |
768 | struct node_info ni; | |
6aa58d8a | 769 | struct page *page, *mpage; |
4356e48e | 770 | block_t newaddr; |
48018b4c | 771 | int err = 0; |
b0332a0f | 772 | bool lfs_mode = f2fs_lfs_mode(fio.sbi); |
4375a336 JK |
773 | |
774 | /* do not read out */ | |
a56c7c6f | 775 | page = f2fs_grab_cache_page(inode->i_mapping, bidx, false); |
4375a336 | 776 | if (!page) |
48018b4c | 777 | return -ENOMEM; |
4375a336 | 778 | |
48018b4c CY |
779 | if (!check_valid_map(F2FS_I_SB(inode), segno, off)) { |
780 | err = -ENOENT; | |
20614711 | 781 | goto out; |
48018b4c | 782 | } |
20614711 | 783 | |
2ef79ecb CY |
784 | if (f2fs_is_atomic_file(inode)) { |
785 | F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++; | |
786 | F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++; | |
48018b4c | 787 | err = -EAGAIN; |
5fe45743 | 788 | goto out; |
2ef79ecb | 789 | } |
5fe45743 | 790 | |
1ad71a27 JK |
791 | if (f2fs_is_pinned_file(inode)) { |
792 | f2fs_pin_file_control(inode, true); | |
48018b4c | 793 | err = -EAGAIN; |
1ad71a27 JK |
794 | goto out; |
795 | } | |
796 | ||
4375a336 | 797 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
4d57b86d | 798 | err = f2fs_get_dnode_of_data(&dn, bidx, LOOKUP_NODE); |
4375a336 JK |
799 | if (err) |
800 | goto out; | |
801 | ||
08b39fbd CY |
802 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
803 | ClearPageUptodate(page); | |
48018b4c | 804 | err = -ENOENT; |
4375a336 | 805 | goto put_out; |
08b39fbd CY |
806 | } |
807 | ||
808 | /* | |
809 | * don't cache encrypted data into meta inode until previous dirty | |
810 | * data were writebacked to avoid racing between GC and flush. | |
811 | */ | |
bae0ee7a | 812 | f2fs_wait_on_page_writeback(page, DATA, true, true); |
4375a336 | 813 | |
9bf1a3f7 YS |
814 | f2fs_wait_on_block_writeback(inode, dn.data_blkaddr); |
815 | ||
7735730d CY |
816 | err = f2fs_get_node_info(fio.sbi, dn.nid, &ni); |
817 | if (err) | |
818 | goto put_out; | |
819 | ||
4375a336 JK |
820 | set_summary(&sum, dn.nid, dn.ofs_in_node, ni.version); |
821 | ||
822 | /* read page */ | |
823 | fio.page = page; | |
7a9d7548 | 824 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
4375a336 | 825 | |
107a805d CY |
826 | if (lfs_mode) |
827 | down_write(&fio.sbi->io_order_lock); | |
828 | ||
543b8c46 JK |
829 | mpage = f2fs_grab_cache_page(META_MAPPING(fio.sbi), |
830 | fio.old_blkaddr, false); | |
831 | if (!mpage) | |
832 | goto up_out; | |
833 | ||
834 | fio.encrypted_page = mpage; | |
835 | ||
836 | /* read source block in mpage */ | |
837 | if (!PageUptodate(mpage)) { | |
838 | err = f2fs_submit_page_bio(&fio); | |
839 | if (err) { | |
840 | f2fs_put_page(mpage, 1); | |
841 | goto up_out; | |
842 | } | |
843 | lock_page(mpage); | |
844 | if (unlikely(mpage->mapping != META_MAPPING(fio.sbi) || | |
845 | !PageUptodate(mpage))) { | |
846 | err = -EIO; | |
847 | f2fs_put_page(mpage, 1); | |
848 | goto up_out; | |
849 | } | |
850 | } | |
851 | ||
4d57b86d | 852 | f2fs_allocate_data_block(fio.sbi, NULL, fio.old_blkaddr, &newaddr, |
fb830fc5 | 853 | &sum, CURSEG_COLD_DATA, NULL, false); |
4356e48e | 854 | |
01eccef7 CY |
855 | fio.encrypted_page = f2fs_pagecache_get_page(META_MAPPING(fio.sbi), |
856 | newaddr, FGP_LOCK | FGP_CREAT, GFP_NOFS); | |
4356e48e CY |
857 | if (!fio.encrypted_page) { |
858 | err = -ENOMEM; | |
6aa58d8a | 859 | f2fs_put_page(mpage, 1); |
543b8c46 | 860 | goto recover_block; |
4356e48e | 861 | } |
548aedac | 862 | |
543b8c46 | 863 | /* write target block */ |
bae0ee7a | 864 | f2fs_wait_on_page_writeback(fio.encrypted_page, DATA, true, true); |
543b8c46 JK |
865 | memcpy(page_address(fio.encrypted_page), |
866 | page_address(mpage), PAGE_SIZE); | |
867 | f2fs_put_page(mpage, 1); | |
868 | invalidate_mapping_pages(META_MAPPING(fio.sbi), | |
869 | fio.old_blkaddr, fio.old_blkaddr); | |
870 | ||
8d64d365 | 871 | set_page_dirty(fio.encrypted_page); |
6282adbf JK |
872 | if (clear_page_dirty_for_io(fio.encrypted_page)) |
873 | dec_page_count(fio.sbi, F2FS_DIRTY_META); | |
874 | ||
548aedac | 875 | set_page_writeback(fio.encrypted_page); |
17c50035 | 876 | ClearPageError(page); |
4375a336 JK |
877 | |
878 | /* allocate block address */ | |
bae0ee7a | 879 | f2fs_wait_on_page_writeback(dn.node_page, NODE, true, true); |
4356e48e | 880 | |
04d328de | 881 | fio.op = REQ_OP_WRITE; |
70fd7614 | 882 | fio.op_flags = REQ_SYNC; |
4356e48e | 883 | fio.new_blkaddr = newaddr; |
fe16efe6 CY |
884 | f2fs_submit_page_write(&fio); |
885 | if (fio.retry) { | |
48018b4c | 886 | err = -EAGAIN; |
a9d572c7 SY |
887 | if (PageWriteback(fio.encrypted_page)) |
888 | end_page_writeback(fio.encrypted_page); | |
889 | goto put_page_out; | |
890 | } | |
4375a336 | 891 | |
b0af6d49 CY |
892 | f2fs_update_iostat(fio.sbi, FS_GC_DATA_IO, F2FS_BLKSIZE); |
893 | ||
f28b3434 | 894 | f2fs_update_data_blkaddr(&dn, newaddr); |
91942321 | 895 | set_inode_flag(inode, FI_APPEND_WRITE); |
4375a336 | 896 | if (page->index == 0) |
91942321 | 897 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
548aedac | 898 | put_page_out: |
4375a336 | 899 | f2fs_put_page(fio.encrypted_page, 1); |
4356e48e CY |
900 | recover_block: |
901 | if (err) | |
4d57b86d | 902 | f2fs_do_replace_block(fio.sbi, &sum, newaddr, fio.old_blkaddr, |
4356e48e | 903 | true, true); |
543b8c46 JK |
904 | up_out: |
905 | if (lfs_mode) | |
906 | up_write(&fio.sbi->io_order_lock); | |
4375a336 JK |
907 | put_out: |
908 | f2fs_put_dnode(&dn); | |
909 | out: | |
910 | f2fs_put_page(page, 1); | |
48018b4c | 911 | return err; |
4375a336 JK |
912 | } |
913 | ||
48018b4c | 914 | static int move_data_page(struct inode *inode, block_t bidx, int gc_type, |
20614711 | 915 | unsigned int segno, int off) |
7bc09003 | 916 | { |
c879f90d | 917 | struct page *page; |
48018b4c | 918 | int err = 0; |
c879f90d | 919 | |
4d57b86d | 920 | page = f2fs_get_lock_data_page(inode, bidx, true); |
c879f90d | 921 | if (IS_ERR(page)) |
48018b4c | 922 | return PTR_ERR(page); |
63a0b7cb | 923 | |
48018b4c CY |
924 | if (!check_valid_map(F2FS_I_SB(inode), segno, off)) { |
925 | err = -ENOENT; | |
20614711 | 926 | goto out; |
48018b4c | 927 | } |
20614711 | 928 | |
2ef79ecb CY |
929 | if (f2fs_is_atomic_file(inode)) { |
930 | F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++; | |
931 | F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++; | |
48018b4c | 932 | err = -EAGAIN; |
5fe45743 | 933 | goto out; |
2ef79ecb | 934 | } |
1ad71a27 JK |
935 | if (f2fs_is_pinned_file(inode)) { |
936 | if (gc_type == FG_GC) | |
937 | f2fs_pin_file_control(inode, true); | |
48018b4c | 938 | err = -EAGAIN; |
1ad71a27 JK |
939 | goto out; |
940 | } | |
5fe45743 | 941 | |
7bc09003 | 942 | if (gc_type == BG_GC) { |
48018b4c CY |
943 | if (PageWriteback(page)) { |
944 | err = -EAGAIN; | |
4ebefc44 | 945 | goto out; |
48018b4c | 946 | } |
7bc09003 JK |
947 | set_page_dirty(page); |
948 | set_cold_data(page); | |
949 | } else { | |
c879f90d JK |
950 | struct f2fs_io_info fio = { |
951 | .sbi = F2FS_I_SB(inode), | |
39d787be | 952 | .ino = inode->i_ino, |
c879f90d | 953 | .type = DATA, |
a912b54d | 954 | .temp = COLD, |
04d328de | 955 | .op = REQ_OP_WRITE, |
70fd7614 | 956 | .op_flags = REQ_SYNC, |
e959c8f5 | 957 | .old_blkaddr = NULL_ADDR, |
c879f90d | 958 | .page = page, |
4375a336 | 959 | .encrypted_page = NULL, |
cc15620b | 960 | .need_lock = LOCK_REQ, |
b0af6d49 | 961 | .io_type = FS_GC_DATA_IO, |
c879f90d | 962 | }; |
72e1c797 | 963 | bool is_dirty = PageDirty(page); |
72e1c797 CY |
964 | |
965 | retry: | |
bae0ee7a | 966 | f2fs_wait_on_page_writeback(page, DATA, true, true); |
8d64d365 CY |
967 | |
968 | set_page_dirty(page); | |
933439c8 | 969 | if (clear_page_dirty_for_io(page)) { |
a7ffdbe2 | 970 | inode_dec_dirty_pages(inode); |
4d57b86d | 971 | f2fs_remove_dirty_inode(inode); |
933439c8 | 972 | } |
72e1c797 | 973 | |
7bc09003 | 974 | set_cold_data(page); |
72e1c797 | 975 | |
4d57b86d | 976 | err = f2fs_do_write_data_page(&fio); |
14a28559 CY |
977 | if (err) { |
978 | clear_cold_data(page); | |
979 | if (err == -ENOMEM) { | |
5df7731f CY |
980 | congestion_wait(BLK_RW_ASYNC, |
981 | DEFAULT_IO_TIMEOUT); | |
14a28559 CY |
982 | goto retry; |
983 | } | |
984 | if (is_dirty) | |
985 | set_page_dirty(page); | |
72e1c797 | 986 | } |
7bc09003 JK |
987 | } |
988 | out: | |
989 | f2fs_put_page(page, 1); | |
48018b4c | 990 | return err; |
7bc09003 JK |
991 | } |
992 | ||
0a8165d7 | 993 | /* |
7bc09003 JK |
994 | * This function tries to get parent node of victim data block, and identifies |
995 | * data block validity. If the block is valid, copy that with cold status and | |
996 | * modify parent node. | |
997 | * If the parent node is not valid or the data block address is different, | |
998 | * the victim data block is ignored. | |
999 | */ | |
48018b4c | 1000 | static int gc_data_segment(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, |
7dda2af8 | 1001 | struct gc_inode_list *gc_list, unsigned int segno, int gc_type) |
7bc09003 JK |
1002 | { |
1003 | struct super_block *sb = sbi->sb; | |
1004 | struct f2fs_summary *entry; | |
1005 | block_t start_addr; | |
43727527 | 1006 | int off; |
7bc09003 | 1007 | int phase = 0; |
48018b4c | 1008 | int submitted = 0; |
7bc09003 JK |
1009 | |
1010 | start_addr = START_BLOCK(sbi, segno); | |
1011 | ||
1012 | next_step: | |
1013 | entry = sum; | |
c718379b | 1014 | |
7bc09003 JK |
1015 | for (off = 0; off < sbi->blocks_per_seg; off++, entry++) { |
1016 | struct page *data_page; | |
1017 | struct inode *inode; | |
1018 | struct node_info dni; /* dnode info for the data */ | |
1019 | unsigned int ofs_in_node, nofs; | |
1020 | block_t start_bidx; | |
7ea984b0 | 1021 | nid_t nid = le32_to_cpu(entry->nid); |
7bc09003 | 1022 | |
803e74be JK |
1023 | /* |
1024 | * stop BG_GC if there is not enough free sections. | |
1025 | * Or, stop GC if the segment becomes fully valid caused by | |
1026 | * race condition along with SSR block allocation. | |
1027 | */ | |
1028 | if ((gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) || | |
2bac0763 JK |
1029 | get_valid_blocks(sbi, segno, true) == |
1030 | BLKS_PER_SEC(sbi)) | |
48018b4c | 1031 | return submitted; |
7bc09003 | 1032 | |
43727527 | 1033 | if (check_valid_map(sbi, segno, off) == 0) |
7bc09003 JK |
1034 | continue; |
1035 | ||
1036 | if (phase == 0) { | |
4d57b86d | 1037 | f2fs_ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), 1, |
7ea984b0 CY |
1038 | META_NAT, true); |
1039 | continue; | |
1040 | } | |
1041 | ||
1042 | if (phase == 1) { | |
4d57b86d | 1043 | f2fs_ra_node_page(sbi, nid); |
7bc09003 JK |
1044 | continue; |
1045 | } | |
1046 | ||
1047 | /* Get an inode by ino with checking validity */ | |
c1079892 | 1048 | if (!is_alive(sbi, entry, &dni, start_addr + off, &nofs)) |
7bc09003 JK |
1049 | continue; |
1050 | ||
7ea984b0 | 1051 | if (phase == 2) { |
4d57b86d | 1052 | f2fs_ra_node_page(sbi, dni.ino); |
7bc09003 JK |
1053 | continue; |
1054 | } | |
1055 | ||
7bc09003 JK |
1056 | ofs_in_node = le16_to_cpu(entry->ofs_in_node); |
1057 | ||
7ea984b0 | 1058 | if (phase == 3) { |
d4686d56 | 1059 | inode = f2fs_iget(sb, dni.ino); |
4eea93e3 JK |
1060 | if (IS_ERR(inode) || is_bad_inode(inode)) { |
1061 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
7bc09003 | 1062 | continue; |
4eea93e3 | 1063 | } |
7bc09003 | 1064 | |
bb06664a | 1065 | if (!down_write_trylock( |
b2532c69 | 1066 | &F2FS_I(inode)->i_gc_rwsem[WRITE])) { |
bb06664a | 1067 | iput(inode); |
6f8d4455 | 1068 | sbi->skipped_gc_rwsem++; |
bb06664a CY |
1069 | continue; |
1070 | } | |
1071 | ||
6aa58d8a CY |
1072 | start_bidx = f2fs_start_bidx_of_node(nofs, inode) + |
1073 | ofs_in_node; | |
1074 | ||
1075 | if (f2fs_post_read_required(inode)) { | |
1076 | int err = ra_data_block(inode, start_bidx); | |
1077 | ||
1078 | up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); | |
1079 | if (err) { | |
1080 | iput(inode); | |
1081 | continue; | |
1082 | } | |
1083 | add_gc_inode(gc_list, inode); | |
1084 | continue; | |
1085 | } | |
1086 | ||
4d57b86d | 1087 | data_page = f2fs_get_read_data_page(inode, |
6aa58d8a | 1088 | start_bidx, REQ_RAHEAD, true); |
b2532c69 | 1089 | up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
31a32688 CL |
1090 | if (IS_ERR(data_page)) { |
1091 | iput(inode); | |
1092 | continue; | |
1093 | } | |
7bc09003 JK |
1094 | |
1095 | f2fs_put_page(data_page, 0); | |
7dda2af8 | 1096 | add_gc_inode(gc_list, inode); |
31a32688 CL |
1097 | continue; |
1098 | } | |
1099 | ||
7ea984b0 | 1100 | /* phase 4 */ |
7dda2af8 | 1101 | inode = find_gc_inode(gc_list, dni.ino); |
31a32688 | 1102 | if (inode) { |
82e0a5aa CY |
1103 | struct f2fs_inode_info *fi = F2FS_I(inode); |
1104 | bool locked = false; | |
48018b4c | 1105 | int err; |
82e0a5aa CY |
1106 | |
1107 | if (S_ISREG(inode->i_mode)) { | |
b2532c69 | 1108 | if (!down_write_trylock(&fi->i_gc_rwsem[READ])) |
82e0a5aa CY |
1109 | continue; |
1110 | if (!down_write_trylock( | |
b2532c69 | 1111 | &fi->i_gc_rwsem[WRITE])) { |
6f8d4455 | 1112 | sbi->skipped_gc_rwsem++; |
b2532c69 | 1113 | up_write(&fi->i_gc_rwsem[READ]); |
82e0a5aa CY |
1114 | continue; |
1115 | } | |
1116 | locked = true; | |
73ac2f4e CY |
1117 | |
1118 | /* wait for all inflight aio data */ | |
1119 | inode_dio_wait(inode); | |
82e0a5aa CY |
1120 | } |
1121 | ||
4d57b86d | 1122 | start_bidx = f2fs_start_bidx_of_node(nofs, inode) |
c879f90d | 1123 | + ofs_in_node; |
6dbb1796 | 1124 | if (f2fs_post_read_required(inode)) |
48018b4c CY |
1125 | err = move_data_block(inode, start_bidx, |
1126 | gc_type, segno, off); | |
4375a336 | 1127 | else |
48018b4c | 1128 | err = move_data_page(inode, start_bidx, gc_type, |
d4c759ee | 1129 | segno, off); |
82e0a5aa | 1130 | |
48018b4c CY |
1131 | if (!err && (gc_type == FG_GC || |
1132 | f2fs_post_read_required(inode))) | |
1133 | submitted++; | |
1134 | ||
82e0a5aa | 1135 | if (locked) { |
b2532c69 CY |
1136 | up_write(&fi->i_gc_rwsem[WRITE]); |
1137 | up_write(&fi->i_gc_rwsem[READ]); | |
82e0a5aa CY |
1138 | } |
1139 | ||
e1235983 | 1140 | stat_inc_data_blk_count(sbi, 1, gc_type); |
7bc09003 | 1141 | } |
7bc09003 | 1142 | } |
c718379b | 1143 | |
7ea984b0 | 1144 | if (++phase < 5) |
7bc09003 | 1145 | goto next_step; |
48018b4c CY |
1146 | |
1147 | return submitted; | |
7bc09003 JK |
1148 | } |
1149 | ||
1150 | static int __get_victim(struct f2fs_sb_info *sbi, unsigned int *victim, | |
8a2d0ace | 1151 | int gc_type) |
7bc09003 JK |
1152 | { |
1153 | struct sit_info *sit_i = SIT_I(sbi); | |
1154 | int ret; | |
8a2d0ace | 1155 | |
3d26fa6b | 1156 | down_write(&sit_i->sentry_lock); |
8a2d0ace GZ |
1157 | ret = DIRTY_I(sbi)->v_ops->get_victim(sbi, victim, gc_type, |
1158 | NO_CHECK_TYPE, LFS); | |
3d26fa6b | 1159 | up_write(&sit_i->sentry_lock); |
7bc09003 JK |
1160 | return ret; |
1161 | } | |
1162 | ||
718e53fa CY |
1163 | static int do_garbage_collect(struct f2fs_sb_info *sbi, |
1164 | unsigned int start_segno, | |
7dda2af8 | 1165 | struct gc_inode_list *gc_list, int gc_type) |
7bc09003 JK |
1166 | { |
1167 | struct page *sum_page; | |
1168 | struct f2fs_summary_block *sum; | |
c718379b | 1169 | struct blk_plug plug; |
718e53fa CY |
1170 | unsigned int segno = start_segno; |
1171 | unsigned int end_segno = start_segno + sbi->segs_per_sec; | |
e3080b01 | 1172 | int seg_freed = 0, migrated = 0; |
718e53fa CY |
1173 | unsigned char type = IS_DATASEG(get_seg_entry(sbi, segno)->type) ? |
1174 | SUM_TYPE_DATA : SUM_TYPE_NODE; | |
48018b4c | 1175 | int submitted = 0; |
7bc09003 | 1176 | |
e3080b01 CY |
1177 | if (__is_large_section(sbi)) |
1178 | end_segno = rounddown(end_segno, sbi->segs_per_sec); | |
1179 | ||
718e53fa | 1180 | /* readahead multi ssa blocks those have contiguous address */ |
2c70c5e3 | 1181 | if (__is_large_section(sbi)) |
4d57b86d | 1182 | f2fs_ra_meta_pages(sbi, GET_SUM_BLOCK(sbi, segno), |
e3080b01 | 1183 | end_segno - segno, META_SSA, true); |
718e53fa CY |
1184 | |
1185 | /* reference all summary page */ | |
1186 | while (segno < end_segno) { | |
4d57b86d | 1187 | sum_page = f2fs_get_sum_page(sbi, segno++); |
edc55aaf JK |
1188 | if (IS_ERR(sum_page)) { |
1189 | int err = PTR_ERR(sum_page); | |
1190 | ||
1191 | end_segno = segno - 1; | |
1192 | for (segno = start_segno; segno < end_segno; segno++) { | |
1193 | sum_page = find_get_page(META_MAPPING(sbi), | |
1194 | GET_SUM_BLOCK(sbi, segno)); | |
1195 | f2fs_put_page(sum_page, 0); | |
1196 | f2fs_put_page(sum_page, 0); | |
1197 | } | |
1198 | return err; | |
1199 | } | |
718e53fa CY |
1200 | unlock_page(sum_page); |
1201 | } | |
7bc09003 | 1202 | |
c718379b JK |
1203 | blk_start_plug(&plug); |
1204 | ||
718e53fa | 1205 | for (segno = start_segno; segno < end_segno; segno++) { |
aa987273 | 1206 | |
718e53fa CY |
1207 | /* find segment summary of victim */ |
1208 | sum_page = find_get_page(META_MAPPING(sbi), | |
1209 | GET_SUM_BLOCK(sbi, segno)); | |
718e53fa | 1210 | f2fs_put_page(sum_page, 0); |
7bc09003 | 1211 | |
d6c66cd1 YS |
1212 | if (get_valid_blocks(sbi, segno, false) == 0) |
1213 | goto freed; | |
dabfbbc8 | 1214 | if (gc_type == BG_GC && __is_large_section(sbi) && |
e3080b01 CY |
1215 | migrated >= sbi->migration_granularity) |
1216 | goto skip; | |
d6c66cd1 | 1217 | if (!PageUptodate(sum_page) || unlikely(f2fs_cp_error(sbi))) |
e3080b01 | 1218 | goto skip; |
de0dcc40 | 1219 | |
718e53fa | 1220 | sum = page_address(sum_page); |
10d255c3 | 1221 | if (type != GET_SUM_TYPE((&sum->footer))) { |
dcbb4c10 JP |
1222 | f2fs_err(sbi, "Inconsistent segment (%u) type [%d, %d] in SSA and SIT", |
1223 | segno, type, GET_SUM_TYPE((&sum->footer))); | |
10d255c3 | 1224 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
793ab1c8 | 1225 | f2fs_stop_checkpoint(sbi, false); |
e3080b01 | 1226 | goto skip; |
10d255c3 | 1227 | } |
718e53fa CY |
1228 | |
1229 | /* | |
1230 | * this is to avoid deadlock: | |
1231 | * - lock_page(sum_page) - f2fs_replace_block | |
3d26fa6b CY |
1232 | * - check_valid_map() - down_write(sentry_lock) |
1233 | * - down_read(sentry_lock) - change_curseg() | |
718e53fa CY |
1234 | * - lock_page(sum_page) |
1235 | */ | |
718e53fa | 1236 | if (type == SUM_TYPE_NODE) |
48018b4c | 1237 | submitted += gc_node_segment(sbi, sum->entries, segno, |
718e53fa | 1238 | gc_type); |
48018b4c CY |
1239 | else |
1240 | submitted += gc_data_segment(sbi, sum->entries, gc_list, | |
1241 | segno, gc_type); | |
718e53fa CY |
1242 | |
1243 | stat_inc_seg_count(sbi, type, gc_type); | |
8c7b9ac1 | 1244 | migrated++; |
c56f16da | 1245 | |
d6c66cd1 | 1246 | freed: |
c56f16da CY |
1247 | if (gc_type == FG_GC && |
1248 | get_valid_blocks(sbi, segno, false) == 0) | |
1249 | seg_freed++; | |
e3080b01 CY |
1250 | |
1251 | if (__is_large_section(sbi) && segno + 1 < end_segno) | |
1252 | sbi->next_victim_seg[gc_type] = segno + 1; | |
1253 | skip: | |
718e53fa CY |
1254 | f2fs_put_page(sum_page, 0); |
1255 | } | |
1256 | ||
48018b4c | 1257 | if (submitted) |
b9109b0e JK |
1258 | f2fs_submit_merged_write(sbi, |
1259 | (type == SUM_TYPE_NODE) ? NODE : DATA); | |
c718379b | 1260 | |
718e53fa | 1261 | blk_finish_plug(&plug); |
7bc09003 | 1262 | |
17d899df CY |
1263 | stat_inc_call_count(sbi->stat_info); |
1264 | ||
c56f16da | 1265 | return seg_freed; |
7bc09003 JK |
1266 | } |
1267 | ||
e066b83c JK |
1268 | int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, |
1269 | bool background, unsigned int segno) | |
7bc09003 | 1270 | { |
d530d4d8 | 1271 | int gc_type = sync ? FG_GC : BG_GC; |
c56f16da CY |
1272 | int sec_freed = 0, seg_freed = 0, total_freed = 0; |
1273 | int ret = 0; | |
d5053a34 | 1274 | struct cp_control cpc; |
e066b83c | 1275 | unsigned int init_segno = segno; |
7dda2af8 CL |
1276 | struct gc_inode_list gc_list = { |
1277 | .ilist = LIST_HEAD_INIT(gc_list.ilist), | |
f6bb2a2c | 1278 | .iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS), |
7dda2af8 | 1279 | }; |
2ef79ecb | 1280 | unsigned long long last_skipped = sbi->skipped_atomic_files[FG_GC]; |
6f8d4455 | 1281 | unsigned long long first_skipped; |
2ef79ecb | 1282 | unsigned int skipped_round = 0, round = 0; |
d5053a34 | 1283 | |
c56f16da CY |
1284 | trace_f2fs_gc_begin(sbi->sb, sync, background, |
1285 | get_pages(sbi, F2FS_DIRTY_NODES), | |
1286 | get_pages(sbi, F2FS_DIRTY_DENTS), | |
1287 | get_pages(sbi, F2FS_DIRTY_IMETA), | |
1288 | free_sections(sbi), | |
1289 | free_segments(sbi), | |
1290 | reserved_segments(sbi), | |
1291 | prefree_segments(sbi)); | |
1292 | ||
119ee914 | 1293 | cpc.reason = __get_cp_reason(sbi); |
6f8d4455 JK |
1294 | sbi->skipped_gc_rwsem = 0; |
1295 | first_skipped = last_skipped; | |
7bc09003 | 1296 | gc_more: |
1751e8a6 | 1297 | if (unlikely(!(sbi->sb->s_flags & SB_ACTIVE))) { |
e5dbd956 | 1298 | ret = -EINVAL; |
408e9375 | 1299 | goto stop; |
e5dbd956 | 1300 | } |
6d5a1495 CY |
1301 | if (unlikely(f2fs_cp_error(sbi))) { |
1302 | ret = -EIO; | |
203681f6 | 1303 | goto stop; |
6d5a1495 | 1304 | } |
7bc09003 | 1305 | |
19f4e688 | 1306 | if (gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) { |
6e17bfbc | 1307 | /* |
19f4e688 HP |
1308 | * For example, if there are many prefree_segments below given |
1309 | * threshold, we can make them free by checkpoint. Then, we | |
1310 | * secure free segments which doesn't need fggc any more. | |
6e17bfbc | 1311 | */ |
4354994f DR |
1312 | if (prefree_segments(sbi) && |
1313 | !is_sbi_flag_set(sbi, SBI_CP_DISABLED)) { | |
4d57b86d | 1314 | ret = f2fs_write_checkpoint(sbi, &cpc); |
8fd5a37e JK |
1315 | if (ret) |
1316 | goto stop; | |
1317 | } | |
19f4e688 HP |
1318 | if (has_not_enough_free_secs(sbi, 0, 0)) |
1319 | gc_type = FG_GC; | |
d64f8047 | 1320 | } |
7bc09003 | 1321 | |
19f4e688 | 1322 | /* f2fs_balance_fs doesn't need to do BG_GC in critical path. */ |
c56f16da CY |
1323 | if (gc_type == BG_GC && !background) { |
1324 | ret = -EINVAL; | |
19f4e688 | 1325 | goto stop; |
c56f16da CY |
1326 | } |
1327 | if (!__get_victim(sbi, &segno, gc_type)) { | |
1328 | ret = -ENODATA; | |
408e9375 | 1329 | goto stop; |
c56f16da | 1330 | } |
7bc09003 | 1331 | |
c56f16da CY |
1332 | seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type); |
1333 | if (gc_type == FG_GC && seg_freed == sbi->segs_per_sec) | |
45fe8492 | 1334 | sec_freed++; |
c56f16da | 1335 | total_freed += seg_freed; |
43727527 | 1336 | |
2ef79ecb | 1337 | if (gc_type == FG_GC) { |
6f8d4455 JK |
1338 | if (sbi->skipped_atomic_files[FG_GC] > last_skipped || |
1339 | sbi->skipped_gc_rwsem) | |
2ef79ecb CY |
1340 | skipped_round++; |
1341 | last_skipped = sbi->skipped_atomic_files[FG_GC]; | |
1342 | round++; | |
1343 | } | |
1344 | ||
957fa478 | 1345 | if (gc_type == FG_GC && seg_freed) |
5ec4e49f | 1346 | sbi->cur_victim_sec = NULL_SEGNO; |
43727527 | 1347 | |
6f8d4455 JK |
1348 | if (sync) |
1349 | goto stop; | |
1350 | ||
1351 | if (has_not_enough_free_secs(sbi, sec_freed, 0)) { | |
1352 | if (skipped_round <= MAX_SKIP_GC_COUNT || | |
1353 | skipped_round * 2 < round) { | |
e066b83c | 1354 | segno = NULL_SEGNO; |
d530d4d8 | 1355 | goto gc_more; |
e066b83c | 1356 | } |
43727527 | 1357 | |
6f8d4455 JK |
1358 | if (first_skipped < last_skipped && |
1359 | (last_skipped - first_skipped) > | |
1360 | sbi->skipped_gc_rwsem) { | |
1361 | f2fs_drop_inmem_pages_all(sbi, true); | |
1362 | segno = NULL_SEGNO; | |
1363 | goto gc_more; | |
1364 | } | |
4354994f | 1365 | if (gc_type == FG_GC && !is_sbi_flag_set(sbi, SBI_CP_DISABLED)) |
4d57b86d | 1366 | ret = f2fs_write_checkpoint(sbi, &cpc); |
d530d4d8 | 1367 | } |
408e9375 | 1368 | stop: |
e066b83c JK |
1369 | SIT_I(sbi)->last_victim[ALLOC_NEXT] = 0; |
1370 | SIT_I(sbi)->last_victim[FLUSH_DEVICE] = init_segno; | |
c56f16da CY |
1371 | |
1372 | trace_f2fs_gc_end(sbi->sb, ret, total_freed, sec_freed, | |
1373 | get_pages(sbi, F2FS_DIRTY_NODES), | |
1374 | get_pages(sbi, F2FS_DIRTY_DENTS), | |
1375 | get_pages(sbi, F2FS_DIRTY_IMETA), | |
1376 | free_sections(sbi), | |
1377 | free_segments(sbi), | |
1378 | reserved_segments(sbi), | |
1379 | prefree_segments(sbi)); | |
1380 | ||
fb24fea7 | 1381 | up_write(&sbi->gc_lock); |
7bc09003 | 1382 | |
7dda2af8 | 1383 | put_gc_inode(&gc_list); |
d530d4d8 | 1384 | |
61f7725a | 1385 | if (sync && !ret) |
d530d4d8 | 1386 | ret = sec_freed ? 0 : -EAGAIN; |
43727527 | 1387 | return ret; |
7bc09003 JK |
1388 | } |
1389 | ||
4d57b86d | 1390 | void f2fs_build_gc_manager(struct f2fs_sb_info *sbi) |
7bc09003 JK |
1391 | { |
1392 | DIRTY_I(sbi)->v_ops = &default_v_ops; | |
e93b9865 | 1393 | |
1ad71a27 | 1394 | sbi->gc_pin_file_threshold = DEF_GC_FAILED_PINNED_FILES; |
d5793249 JK |
1395 | |
1396 | /* give warm/cold data area from slower device */ | |
0916878d | 1397 | if (f2fs_is_multi_device(sbi) && !__is_large_section(sbi)) |
d5793249 JK |
1398 | SIT_I(sbi)->last_victim[ALLOC_NEXT] = |
1399 | GET_SEGNO(sbi, FDEV(0).end_blk) + 1; | |
7bc09003 | 1400 | } |
04f0b2ea QS |
1401 | |
1402 | static int free_segment_range(struct f2fs_sb_info *sbi, unsigned int start, | |
1403 | unsigned int end) | |
1404 | { | |
1405 | int type; | |
1406 | unsigned int segno, next_inuse; | |
1407 | int err = 0; | |
1408 | ||
1409 | /* Move out cursegs from the target range */ | |
1410 | for (type = CURSEG_HOT_DATA; type < NR_CURSEG_TYPE; type++) | |
1411 | allocate_segment_for_resize(sbi, type, start, end); | |
1412 | ||
1413 | /* do GC to move out valid blocks in the range */ | |
1414 | for (segno = start; segno <= end; segno += sbi->segs_per_sec) { | |
1415 | struct gc_inode_list gc_list = { | |
1416 | .ilist = LIST_HEAD_INIT(gc_list.ilist), | |
1417 | .iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS), | |
1418 | }; | |
1419 | ||
fb24fea7 | 1420 | down_write(&sbi->gc_lock); |
04f0b2ea | 1421 | do_garbage_collect(sbi, segno, &gc_list, FG_GC); |
fb24fea7 | 1422 | up_write(&sbi->gc_lock); |
04f0b2ea QS |
1423 | put_gc_inode(&gc_list); |
1424 | ||
1425 | if (get_valid_blocks(sbi, segno, true)) | |
1426 | return -EAGAIN; | |
1427 | } | |
1428 | ||
1429 | err = f2fs_sync_fs(sbi->sb, 1); | |
1430 | if (err) | |
1431 | return err; | |
1432 | ||
1433 | next_inuse = find_next_inuse(FREE_I(sbi), end + 1, start); | |
1434 | if (next_inuse <= end) { | |
dcbb4c10 JP |
1435 | f2fs_err(sbi, "segno %u should be free but still inuse!", |
1436 | next_inuse); | |
04f0b2ea QS |
1437 | f2fs_bug_on(sbi, 1); |
1438 | } | |
1439 | return err; | |
1440 | } | |
1441 | ||
1442 | static void update_sb_metadata(struct f2fs_sb_info *sbi, int secs) | |
1443 | { | |
1444 | struct f2fs_super_block *raw_sb = F2FS_RAW_SUPER(sbi); | |
a4ba5dfc CY |
1445 | int section_count; |
1446 | int segment_count; | |
1447 | int segment_count_main; | |
1448 | long long block_count; | |
04f0b2ea QS |
1449 | int segs = secs * sbi->segs_per_sec; |
1450 | ||
a4ba5dfc CY |
1451 | down_write(&sbi->sb_lock); |
1452 | ||
1453 | section_count = le32_to_cpu(raw_sb->section_count); | |
1454 | segment_count = le32_to_cpu(raw_sb->segment_count); | |
1455 | segment_count_main = le32_to_cpu(raw_sb->segment_count_main); | |
1456 | block_count = le64_to_cpu(raw_sb->block_count); | |
1457 | ||
04f0b2ea QS |
1458 | raw_sb->section_count = cpu_to_le32(section_count + secs); |
1459 | raw_sb->segment_count = cpu_to_le32(segment_count + segs); | |
1460 | raw_sb->segment_count_main = cpu_to_le32(segment_count_main + segs); | |
1461 | raw_sb->block_count = cpu_to_le64(block_count + | |
1462 | (long long)segs * sbi->blocks_per_seg); | |
46d9ce19 QS |
1463 | if (f2fs_is_multi_device(sbi)) { |
1464 | int last_dev = sbi->s_ndevs - 1; | |
1465 | int dev_segs = | |
1466 | le32_to_cpu(raw_sb->devs[last_dev].total_segments); | |
1467 | ||
1468 | raw_sb->devs[last_dev].total_segments = | |
1469 | cpu_to_le32(dev_segs + segs); | |
1470 | } | |
a4ba5dfc CY |
1471 | |
1472 | up_write(&sbi->sb_lock); | |
04f0b2ea QS |
1473 | } |
1474 | ||
1475 | static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs) | |
1476 | { | |
1477 | int segs = secs * sbi->segs_per_sec; | |
46d9ce19 | 1478 | long long blks = (long long)segs * sbi->blocks_per_seg; |
04f0b2ea QS |
1479 | long long user_block_count = |
1480 | le64_to_cpu(F2FS_CKPT(sbi)->user_block_count); | |
1481 | ||
1482 | SM_I(sbi)->segment_count = (int)SM_I(sbi)->segment_count + segs; | |
1483 | MAIN_SEGS(sbi) = (int)MAIN_SEGS(sbi) + segs; | |
1484 | FREE_I(sbi)->free_sections = (int)FREE_I(sbi)->free_sections + secs; | |
1485 | FREE_I(sbi)->free_segments = (int)FREE_I(sbi)->free_segments + segs; | |
46d9ce19 QS |
1486 | F2FS_CKPT(sbi)->user_block_count = cpu_to_le64(user_block_count + blks); |
1487 | ||
1488 | if (f2fs_is_multi_device(sbi)) { | |
1489 | int last_dev = sbi->s_ndevs - 1; | |
1490 | ||
1491 | FDEV(last_dev).total_segments = | |
1492 | (int)FDEV(last_dev).total_segments + segs; | |
1493 | FDEV(last_dev).end_blk = | |
1494 | (long long)FDEV(last_dev).end_blk + blks; | |
1495 | #ifdef CONFIG_BLK_DEV_ZONED | |
1496 | FDEV(last_dev).nr_blkz = (int)FDEV(last_dev).nr_blkz + | |
1497 | (int)(blks >> sbi->log_blocks_per_blkz); | |
1498 | #endif | |
1499 | } | |
04f0b2ea QS |
1500 | } |
1501 | ||
1502 | int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count) | |
1503 | { | |
1504 | __u64 old_block_count, shrunk_blocks; | |
1505 | unsigned int secs; | |
1506 | int gc_mode, gc_type; | |
1507 | int err = 0; | |
1508 | __u32 rem; | |
1509 | ||
1510 | old_block_count = le64_to_cpu(F2FS_RAW_SUPER(sbi)->block_count); | |
1511 | if (block_count > old_block_count) | |
1512 | return -EINVAL; | |
1513 | ||
46d9ce19 QS |
1514 | if (f2fs_is_multi_device(sbi)) { |
1515 | int last_dev = sbi->s_ndevs - 1; | |
1516 | __u64 last_segs = FDEV(last_dev).total_segments; | |
1517 | ||
1518 | if (block_count + last_segs * sbi->blocks_per_seg <= | |
1519 | old_block_count) | |
1520 | return -EINVAL; | |
1521 | } | |
1522 | ||
04f0b2ea QS |
1523 | /* new fs size should align to section size */ |
1524 | div_u64_rem(block_count, BLKS_PER_SEC(sbi), &rem); | |
1525 | if (rem) | |
1526 | return -EINVAL; | |
1527 | ||
1528 | if (block_count == old_block_count) | |
1529 | return 0; | |
1530 | ||
1531 | if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) { | |
dcbb4c10 | 1532 | f2fs_err(sbi, "Should run fsck to repair first."); |
10f966bb | 1533 | return -EFSCORRUPTED; |
04f0b2ea QS |
1534 | } |
1535 | ||
1536 | if (test_opt(sbi, DISABLE_CHECKPOINT)) { | |
dcbb4c10 | 1537 | f2fs_err(sbi, "Checkpoint should be enabled."); |
04f0b2ea QS |
1538 | return -EINVAL; |
1539 | } | |
1540 | ||
1541 | freeze_bdev(sbi->sb->s_bdev); | |
1542 | ||
1543 | shrunk_blocks = old_block_count - block_count; | |
1544 | secs = div_u64(shrunk_blocks, BLKS_PER_SEC(sbi)); | |
1545 | spin_lock(&sbi->stat_lock); | |
1546 | if (shrunk_blocks + valid_user_blocks(sbi) + | |
1547 | sbi->current_reserved_blocks + sbi->unusable_block_count + | |
1548 | F2FS_OPTION(sbi).root_reserved_blocks > sbi->user_block_count) | |
1549 | err = -ENOSPC; | |
1550 | else | |
1551 | sbi->user_block_count -= shrunk_blocks; | |
1552 | spin_unlock(&sbi->stat_lock); | |
1553 | if (err) { | |
1554 | thaw_bdev(sbi->sb->s_bdev, sbi->sb); | |
1555 | return err; | |
1556 | } | |
1557 | ||
1558 | mutex_lock(&sbi->resize_mutex); | |
1559 | set_sbi_flag(sbi, SBI_IS_RESIZEFS); | |
1560 | ||
1561 | mutex_lock(&DIRTY_I(sbi)->seglist_lock); | |
1562 | ||
1563 | MAIN_SECS(sbi) -= secs; | |
1564 | ||
1565 | for (gc_mode = 0; gc_mode < MAX_GC_POLICY; gc_mode++) | |
1566 | if (SIT_I(sbi)->last_victim[gc_mode] >= | |
1567 | MAIN_SECS(sbi) * sbi->segs_per_sec) | |
1568 | SIT_I(sbi)->last_victim[gc_mode] = 0; | |
1569 | ||
1570 | for (gc_type = BG_GC; gc_type <= FG_GC; gc_type++) | |
1571 | if (sbi->next_victim_seg[gc_type] >= | |
1572 | MAIN_SECS(sbi) * sbi->segs_per_sec) | |
1573 | sbi->next_victim_seg[gc_type] = NULL_SEGNO; | |
1574 | ||
1575 | mutex_unlock(&DIRTY_I(sbi)->seglist_lock); | |
1576 | ||
1577 | err = free_segment_range(sbi, MAIN_SECS(sbi) * sbi->segs_per_sec, | |
1578 | MAIN_SEGS(sbi) - 1); | |
1579 | if (err) | |
1580 | goto out; | |
1581 | ||
1582 | update_sb_metadata(sbi, -secs); | |
1583 | ||
1584 | err = f2fs_commit_super(sbi, false); | |
1585 | if (err) { | |
1586 | update_sb_metadata(sbi, secs); | |
1587 | goto out; | |
1588 | } | |
1589 | ||
68275682 | 1590 | mutex_lock(&sbi->cp_mutex); |
04f0b2ea QS |
1591 | update_fs_metadata(sbi, -secs); |
1592 | clear_sbi_flag(sbi, SBI_IS_RESIZEFS); | |
68275682 ST |
1593 | set_sbi_flag(sbi, SBI_IS_DIRTY); |
1594 | mutex_unlock(&sbi->cp_mutex); | |
1595 | ||
04f0b2ea QS |
1596 | err = f2fs_sync_fs(sbi->sb, 1); |
1597 | if (err) { | |
68275682 | 1598 | mutex_lock(&sbi->cp_mutex); |
04f0b2ea | 1599 | update_fs_metadata(sbi, secs); |
68275682 | 1600 | mutex_unlock(&sbi->cp_mutex); |
04f0b2ea QS |
1601 | update_sb_metadata(sbi, secs); |
1602 | f2fs_commit_super(sbi, false); | |
1603 | } | |
1604 | out: | |
1605 | if (err) { | |
1606 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
dcbb4c10 | 1607 | f2fs_err(sbi, "resize_fs failed, should run fsck to repair!"); |
04f0b2ea QS |
1608 | |
1609 | MAIN_SECS(sbi) += secs; | |
1610 | spin_lock(&sbi->stat_lock); | |
1611 | sbi->user_block_count += shrunk_blocks; | |
1612 | spin_unlock(&sbi->stat_lock); | |
1613 | } | |
1614 | clear_sbi_flag(sbi, SBI_IS_RESIZEFS); | |
1615 | mutex_unlock(&sbi->resize_mutex); | |
1616 | thaw_bdev(sbi->sb->s_bdev, sbi->sb); | |
1617 | return err; | |
1618 | } |