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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> | |
b4b10061 | 16 | #include <linux/sched/signal.h> |
7bc09003 JK |
17 | |
18 | #include "f2fs.h" | |
19 | #include "node.h" | |
20 | #include "segment.h" | |
21 | #include "gc.h" | |
8e46b3ed | 22 | #include <trace/events/f2fs.h> |
7bc09003 | 23 | |
da52f8ad JQ |
24 | static unsigned int count_bits(const unsigned long *addr, |
25 | unsigned int offset, unsigned int len); | |
26 | ||
7bc09003 JK |
27 | static int gc_thread_func(void *data) |
28 | { | |
29 | struct f2fs_sb_info *sbi = data; | |
b59d0bae | 30 | struct f2fs_gc_kthread *gc_th = sbi->gc_thread; |
7bc09003 | 31 | wait_queue_head_t *wq = &sbi->gc_thread->gc_wait_queue_head; |
b8c502b8 | 32 | unsigned int wait_ms; |
7bc09003 | 33 | |
b59d0bae | 34 | wait_ms = gc_th->min_sleep_time; |
7bc09003 | 35 | |
1d7be270 | 36 | set_freezable(); |
7bc09003 | 37 | do { |
bbbc34fd CY |
38 | bool sync_mode; |
39 | ||
1d7be270 | 40 | wait_event_interruptible_timeout(*wq, |
d9872a69 JK |
41 | kthread_should_stop() || freezing(current) || |
42 | gc_th->gc_wake, | |
1d7be270 JK |
43 | msecs_to_jiffies(wait_ms)); |
44 | ||
d9872a69 JK |
45 | /* give it a try one time */ |
46 | if (gc_th->gc_wake) | |
47 | gc_th->gc_wake = 0; | |
48 | ||
274bd9ba CY |
49 | if (try_to_freeze()) { |
50 | stat_other_skip_bggc_count(sbi); | |
7bc09003 | 51 | continue; |
274bd9ba | 52 | } |
7bc09003 JK |
53 | if (kthread_should_stop()) |
54 | break; | |
55 | ||
d6212a5f | 56 | if (sbi->sb->s_writers.frozen >= SB_FREEZE_WRITE) { |
88dd8934 | 57 | increase_sleep_time(gc_th, &wait_ms); |
274bd9ba | 58 | stat_other_skip_bggc_count(sbi); |
d6212a5f CL |
59 | continue; |
60 | } | |
61 | ||
55523519 | 62 | if (time_to_inject(sbi, FAULT_CHECKPOINT)) { |
c45d6002 | 63 | f2fs_show_injection_info(sbi, FAULT_CHECKPOINT); |
0f348028 | 64 | f2fs_stop_checkpoint(sbi, false); |
55523519 | 65 | } |
0f348028 | 66 | |
274bd9ba CY |
67 | if (!sb_start_write_trylock(sbi->sb)) { |
68 | stat_other_skip_bggc_count(sbi); | |
dc6febb6 | 69 | continue; |
274bd9ba | 70 | } |
dc6febb6 | 71 | |
7bc09003 JK |
72 | /* |
73 | * [GC triggering condition] | |
74 | * 0. GC is not conducted currently. | |
75 | * 1. There are enough dirty segments. | |
76 | * 2. IO subsystem is idle by checking the # of writeback pages. | |
77 | * 3. IO subsystem is idle by checking the # of requests in | |
78 | * bdev's request list. | |
79 | * | |
e1c42045 | 80 | * Note) We have to avoid triggering GCs frequently. |
7bc09003 JK |
81 | * Because it is possible that some segments can be |
82 | * invalidated soon after by user update or deletion. | |
83 | * So, I'd like to wait some time to collect dirty segments. | |
84 | */ | |
5b0e9539 | 85 | if (sbi->gc_mode == GC_URGENT) { |
d9872a69 | 86 | wait_ms = gc_th->urgent_sleep_time; |
fb24fea7 | 87 | down_write(&sbi->gc_lock); |
d9872a69 JK |
88 | goto do_gc; |
89 | } | |
90 | ||
fb24fea7 | 91 | if (!down_write_trylock(&sbi->gc_lock)) { |
274bd9ba | 92 | stat_other_skip_bggc_count(sbi); |
69babac0 | 93 | goto next; |
274bd9ba | 94 | } |
69babac0 | 95 | |
a7d10cf3 | 96 | if (!is_idle(sbi, GC_TIME)) { |
88dd8934 | 97 | increase_sleep_time(gc_th, &wait_ms); |
fb24fea7 | 98 | up_write(&sbi->gc_lock); |
274bd9ba | 99 | stat_io_skip_bggc_count(sbi); |
dc6febb6 | 100 | goto next; |
7bc09003 JK |
101 | } |
102 | ||
103 | if (has_enough_invalid_blocks(sbi)) | |
88dd8934 | 104 | decrease_sleep_time(gc_th, &wait_ms); |
7bc09003 | 105 | else |
88dd8934 | 106 | increase_sleep_time(gc_th, &wait_ms); |
d9872a69 | 107 | do_gc: |
fc7100ea | 108 | stat_inc_bggc_count(sbi->stat_info); |
7bc09003 | 109 | |
bbbc34fd CY |
110 | sync_mode = F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC; |
111 | ||
43727527 | 112 | /* if return value is not zero, no victim was selected */ |
bbbc34fd | 113 | if (f2fs_gc(sbi, sync_mode, true, NULL_SEGNO)) |
b59d0bae | 114 | wait_ms = gc_th->no_gc_sleep_time; |
81eb8d6e | 115 | |
84e4214f JK |
116 | trace_f2fs_background_gc(sbi->sb, wait_ms, |
117 | prefree_segments(sbi), free_segments(sbi)); | |
118 | ||
4660f9c0 | 119 | /* balancing f2fs's metadata periodically */ |
7bcd0cfa | 120 | f2fs_balance_fs_bg(sbi, true); |
dc6febb6 CY |
121 | next: |
122 | sb_end_write(sbi->sb); | |
81eb8d6e | 123 | |
7bc09003 JK |
124 | } while (!kthread_should_stop()); |
125 | return 0; | |
126 | } | |
127 | ||
4d57b86d | 128 | int f2fs_start_gc_thread(struct f2fs_sb_info *sbi) |
7bc09003 | 129 | { |
1042d60f | 130 | struct f2fs_gc_kthread *gc_th; |
ec7b1f2d | 131 | dev_t dev = sbi->sb->s_bdev->bd_dev; |
7a267f8d | 132 | int err = 0; |
7bc09003 | 133 | |
1ecc0c5c | 134 | gc_th = f2fs_kmalloc(sbi, sizeof(struct f2fs_gc_kthread), GFP_KERNEL); |
7a267f8d NJ |
135 | if (!gc_th) { |
136 | err = -ENOMEM; | |
137 | goto out; | |
138 | } | |
7bc09003 | 139 | |
d9872a69 | 140 | gc_th->urgent_sleep_time = DEF_GC_THREAD_URGENT_SLEEP_TIME; |
b59d0bae NJ |
141 | gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME; |
142 | gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME; | |
143 | gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME; | |
144 | ||
d9872a69 | 145 | gc_th->gc_wake= 0; |
d2dc095f | 146 | |
7bc09003 JK |
147 | sbi->gc_thread = gc_th; |
148 | init_waitqueue_head(&sbi->gc_thread->gc_wait_queue_head); | |
149 | sbi->gc_thread->f2fs_gc_task = kthread_run(gc_thread_func, sbi, | |
ec7b1f2d | 150 | "f2fs_gc-%u:%u", MAJOR(dev), MINOR(dev)); |
7bc09003 | 151 | if (IS_ERR(gc_th->f2fs_gc_task)) { |
7a267f8d | 152 | err = PTR_ERR(gc_th->f2fs_gc_task); |
5222595d | 153 | kvfree(gc_th); |
25718423 | 154 | sbi->gc_thread = NULL; |
7bc09003 | 155 | } |
7a267f8d NJ |
156 | out: |
157 | return err; | |
7bc09003 JK |
158 | } |
159 | ||
4d57b86d | 160 | void f2fs_stop_gc_thread(struct f2fs_sb_info *sbi) |
7bc09003 JK |
161 | { |
162 | struct f2fs_gc_kthread *gc_th = sbi->gc_thread; | |
163 | if (!gc_th) | |
164 | return; | |
165 | kthread_stop(gc_th->f2fs_gc_task); | |
5222595d | 166 | kvfree(gc_th); |
7bc09003 JK |
167 | sbi->gc_thread = NULL; |
168 | } | |
169 | ||
5b0e9539 | 170 | static int select_gc_type(struct f2fs_sb_info *sbi, int gc_type) |
7bc09003 | 171 | { |
d2dc095f NJ |
172 | int gc_mode = (gc_type == BG_GC) ? GC_CB : GC_GREEDY; |
173 | ||
5b0e9539 JK |
174 | switch (sbi->gc_mode) { |
175 | case GC_IDLE_CB: | |
176 | gc_mode = GC_CB; | |
177 | break; | |
178 | case GC_IDLE_GREEDY: | |
179 | case GC_URGENT: | |
b27bc809 | 180 | gc_mode = GC_GREEDY; |
5b0e9539 JK |
181 | break; |
182 | } | |
d2dc095f | 183 | return gc_mode; |
7bc09003 JK |
184 | } |
185 | ||
186 | static void select_policy(struct f2fs_sb_info *sbi, int gc_type, | |
187 | int type, struct victim_sel_policy *p) | |
188 | { | |
189 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
190 | ||
4ebefc44 | 191 | if (p->alloc_mode == SSR) { |
7bc09003 | 192 | p->gc_mode = GC_GREEDY; |
da52f8ad | 193 | p->dirty_bitmap = dirty_i->dirty_segmap[type]; |
a26b7c8a | 194 | p->max_search = dirty_i->nr_dirty[type]; |
7bc09003 JK |
195 | p->ofs_unit = 1; |
196 | } else { | |
5b0e9539 | 197 | p->gc_mode = select_gc_type(sbi, gc_type); |
7bc09003 | 198 | p->ofs_unit = sbi->segs_per_sec; |
da52f8ad JQ |
199 | if (__is_large_section(sbi)) { |
200 | p->dirty_bitmap = dirty_i->dirty_secmap; | |
201 | p->max_search = count_bits(p->dirty_bitmap, | |
202 | 0, MAIN_SECS(sbi)); | |
203 | } else { | |
204 | p->dirty_bitmap = dirty_i->dirty_segmap[DIRTY]; | |
205 | p->max_search = dirty_i->nr_dirty[DIRTY]; | |
206 | } | |
7bc09003 | 207 | } |
a26b7c8a | 208 | |
7a88ddb5 CY |
209 | /* |
210 | * adjust candidates range, should select all dirty segments for | |
211 | * foreground GC and urgent GC cases. | |
212 | */ | |
b27bc809 | 213 | if (gc_type != FG_GC && |
5b0e9539 | 214 | (sbi->gc_mode != GC_URGENT) && |
b27bc809 | 215 | p->max_search > sbi->max_victim_search) |
b1c57c1c | 216 | p->max_search = sbi->max_victim_search; |
a26b7c8a | 217 | |
b94929d9 YS |
218 | /* let's select beginning hot/small space first in no_heap mode*/ |
219 | if (test_opt(sbi, NOHEAP) && | |
220 | (type == CURSEG_HOT_DATA || IS_NODESEG(type))) | |
7a20b8a6 JK |
221 | p->offset = 0; |
222 | else | |
e066b83c | 223 | p->offset = SIT_I(sbi)->last_victim[p->gc_mode]; |
7bc09003 JK |
224 | } |
225 | ||
226 | static unsigned int get_max_cost(struct f2fs_sb_info *sbi, | |
227 | struct victim_sel_policy *p) | |
228 | { | |
b7250d2d JK |
229 | /* SSR allocates in a segment unit */ |
230 | if (p->alloc_mode == SSR) | |
3519e3f9 | 231 | return sbi->blocks_per_seg; |
7bc09003 | 232 | if (p->gc_mode == GC_GREEDY) |
c541a51b | 233 | return 2 * sbi->blocks_per_seg * p->ofs_unit; |
7bc09003 JK |
234 | else if (p->gc_mode == GC_CB) |
235 | return UINT_MAX; | |
236 | else /* No other gc_mode */ | |
237 | return 0; | |
238 | } | |
239 | ||
240 | static unsigned int check_bg_victims(struct f2fs_sb_info *sbi) | |
241 | { | |
242 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
5ec4e49f | 243 | unsigned int secno; |
7bc09003 JK |
244 | |
245 | /* | |
246 | * If the gc_type is FG_GC, we can select victim segments | |
247 | * selected by background GC before. | |
248 | * Those segments guarantee they have small valid blocks. | |
249 | */ | |
7cd8558b | 250 | for_each_set_bit(secno, dirty_i->victim_secmap, MAIN_SECS(sbi)) { |
5ec4e49f | 251 | if (sec_usage_check(sbi, secno)) |
b65ee148 | 252 | continue; |
5ec4e49f | 253 | clear_bit(secno, dirty_i->victim_secmap); |
4ddb1a4d | 254 | return GET_SEG_FROM_SEC(sbi, secno); |
7bc09003 JK |
255 | } |
256 | return NULL_SEGNO; | |
257 | } | |
258 | ||
259 | static unsigned int get_cb_cost(struct f2fs_sb_info *sbi, unsigned int segno) | |
260 | { | |
261 | struct sit_info *sit_i = SIT_I(sbi); | |
4ddb1a4d JK |
262 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); |
263 | unsigned int start = GET_SEG_FROM_SEC(sbi, secno); | |
7bc09003 JK |
264 | unsigned long long mtime = 0; |
265 | unsigned int vblocks; | |
266 | unsigned char age = 0; | |
267 | unsigned char u; | |
268 | unsigned int i; | |
269 | ||
270 | for (i = 0; i < sbi->segs_per_sec; i++) | |
271 | mtime += get_seg_entry(sbi, start + i)->mtime; | |
302bd348 | 272 | vblocks = get_valid_blocks(sbi, segno, true); |
7bc09003 JK |
273 | |
274 | mtime = div_u64(mtime, sbi->segs_per_sec); | |
275 | vblocks = div_u64(vblocks, sbi->segs_per_sec); | |
276 | ||
277 | u = (vblocks * 100) >> sbi->log_blocks_per_seg; | |
278 | ||
e1c42045 | 279 | /* Handle if the system time has changed by the user */ |
7bc09003 JK |
280 | if (mtime < sit_i->min_mtime) |
281 | sit_i->min_mtime = mtime; | |
282 | if (mtime > sit_i->max_mtime) | |
283 | sit_i->max_mtime = mtime; | |
284 | if (sit_i->max_mtime != sit_i->min_mtime) | |
285 | age = 100 - div64_u64(100 * (mtime - sit_i->min_mtime), | |
286 | sit_i->max_mtime - sit_i->min_mtime); | |
287 | ||
288 | return UINT_MAX - ((100 * (100 - u) * age) / (100 + u)); | |
289 | } | |
290 | ||
a57e564d JX |
291 | static inline unsigned int get_gc_cost(struct f2fs_sb_info *sbi, |
292 | unsigned int segno, struct victim_sel_policy *p) | |
7bc09003 JK |
293 | { |
294 | if (p->alloc_mode == SSR) | |
2afce76a | 295 | return get_seg_entry(sbi, segno)->ckpt_valid_blocks; |
7bc09003 JK |
296 | |
297 | /* alloc_mode == LFS */ | |
298 | if (p->gc_mode == GC_GREEDY) | |
91f4382b | 299 | return get_valid_blocks(sbi, segno, true); |
7bc09003 JK |
300 | else |
301 | return get_cb_cost(sbi, segno); | |
302 | } | |
303 | ||
688159b6 FL |
304 | static unsigned int count_bits(const unsigned long *addr, |
305 | unsigned int offset, unsigned int len) | |
306 | { | |
307 | unsigned int end = offset + len, sum = 0; | |
308 | ||
309 | while (offset < end) { | |
310 | if (test_bit(offset++, addr)) | |
311 | ++sum; | |
312 | } | |
313 | return sum; | |
314 | } | |
315 | ||
0a8165d7 | 316 | /* |
111d2495 | 317 | * This function is called from two paths. |
7bc09003 JK |
318 | * One is garbage collection and the other is SSR segment selection. |
319 | * When it is called during GC, it just gets a victim segment | |
320 | * and it does not remove it from dirty seglist. | |
321 | * When it is called from SSR segment selection, it finds a segment | |
322 | * which has minimum valid blocks and removes it from dirty seglist. | |
323 | */ | |
324 | static int get_victim_by_default(struct f2fs_sb_info *sbi, | |
325 | unsigned int *result, int gc_type, int type, char alloc_mode) | |
326 | { | |
327 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
e066b83c | 328 | struct sit_info *sm = SIT_I(sbi); |
7bc09003 | 329 | struct victim_sel_policy p; |
3fa56503 | 330 | unsigned int secno, last_victim; |
04f0b2ea | 331 | unsigned int last_segment; |
688159b6 | 332 | unsigned int nsearched = 0; |
97767500 | 333 | int ret = 0; |
7bc09003 | 334 | |
210f41bc | 335 | mutex_lock(&dirty_i->seglist_lock); |
04f0b2ea | 336 | last_segment = MAIN_SECS(sbi) * sbi->segs_per_sec; |
210f41bc | 337 | |
7bc09003 JK |
338 | p.alloc_mode = alloc_mode; |
339 | select_policy(sbi, gc_type, type, &p); | |
340 | ||
341 | p.min_segno = NULL_SEGNO; | |
3fa56503 | 342 | p.min_cost = get_max_cost(sbi, &p); |
7bc09003 | 343 | |
e066b83c | 344 | if (*result != NULL_SEGNO) { |
97767500 QZ |
345 | if (!get_valid_blocks(sbi, *result, false)) { |
346 | ret = -ENODATA; | |
347 | goto out; | |
348 | } | |
349 | ||
350 | if (sec_usage_check(sbi, GET_SEC_FROM_SEG(sbi, *result))) | |
351 | ret = -EBUSY; | |
352 | else | |
e066b83c JK |
353 | p.min_segno = *result; |
354 | goto out; | |
355 | } | |
356 | ||
97767500 | 357 | ret = -ENODATA; |
3342bb30 CY |
358 | if (p.max_search == 0) |
359 | goto out; | |
360 | ||
e3080b01 CY |
361 | if (__is_large_section(sbi) && p.alloc_mode == LFS) { |
362 | if (sbi->next_victim_seg[BG_GC] != NULL_SEGNO) { | |
363 | p.min_segno = sbi->next_victim_seg[BG_GC]; | |
364 | *result = p.min_segno; | |
365 | sbi->next_victim_seg[BG_GC] = NULL_SEGNO; | |
366 | goto got_result; | |
367 | } | |
368 | if (gc_type == FG_GC && | |
369 | sbi->next_victim_seg[FG_GC] != NULL_SEGNO) { | |
370 | p.min_segno = sbi->next_victim_seg[FG_GC]; | |
371 | *result = p.min_segno; | |
372 | sbi->next_victim_seg[FG_GC] = NULL_SEGNO; | |
373 | goto got_result; | |
374 | } | |
375 | } | |
376 | ||
e066b83c | 377 | last_victim = sm->last_victim[p.gc_mode]; |
7bc09003 JK |
378 | if (p.alloc_mode == LFS && gc_type == FG_GC) { |
379 | p.min_segno = check_bg_victims(sbi); | |
380 | if (p.min_segno != NULL_SEGNO) | |
381 | goto got_it; | |
382 | } | |
383 | ||
384 | while (1) { | |
da52f8ad JQ |
385 | unsigned long cost, *dirty_bitmap; |
386 | unsigned int unit_no, segno; | |
387 | ||
388 | dirty_bitmap = p.dirty_bitmap; | |
389 | unit_no = find_next_bit(dirty_bitmap, | |
390 | last_segment / p.ofs_unit, | |
391 | p.offset / p.ofs_unit); | |
392 | segno = unit_no * p.ofs_unit; | |
a43f7ec3 | 393 | if (segno >= last_segment) { |
e066b83c JK |
394 | if (sm->last_victim[p.gc_mode]) { |
395 | last_segment = | |
396 | sm->last_victim[p.gc_mode]; | |
397 | sm->last_victim[p.gc_mode] = 0; | |
7bc09003 JK |
398 | p.offset = 0; |
399 | continue; | |
400 | } | |
401 | break; | |
402 | } | |
a57e564d JX |
403 | |
404 | p.offset = segno + p.ofs_unit; | |
da52f8ad | 405 | nsearched++; |
688159b6 | 406 | |
bbf9f7d9 ST |
407 | #ifdef CONFIG_F2FS_CHECK_FS |
408 | /* | |
409 | * skip selecting the invalid segno (that is failed due to block | |
410 | * validity check failure during GC) to avoid endless GC loop in | |
411 | * such cases. | |
412 | */ | |
413 | if (test_bit(segno, sm->invalid_segmap)) | |
414 | goto next; | |
415 | #endif | |
416 | ||
4ddb1a4d | 417 | secno = GET_SEC_FROM_SEG(sbi, segno); |
7bc09003 | 418 | |
5ec4e49f | 419 | if (sec_usage_check(sbi, secno)) |
688159b6 | 420 | goto next; |
4354994f DR |
421 | /* Don't touch checkpointed data */ |
422 | if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) && | |
49dd883c JK |
423 | get_ckpt_valid_blocks(sbi, segno) && |
424 | p.alloc_mode != SSR)) | |
4354994f | 425 | goto next; |
5ec4e49f | 426 | if (gc_type == BG_GC && test_bit(secno, dirty_i->victim_secmap)) |
688159b6 | 427 | goto next; |
7bc09003 JK |
428 | |
429 | cost = get_gc_cost(sbi, segno, &p); | |
430 | ||
431 | if (p.min_cost > cost) { | |
432 | p.min_segno = segno; | |
433 | p.min_cost = cost; | |
a57e564d | 434 | } |
688159b6 FL |
435 | next: |
436 | if (nsearched >= p.max_search) { | |
e066b83c | 437 | if (!sm->last_victim[p.gc_mode] && segno <= last_victim) |
da52f8ad JQ |
438 | sm->last_victim[p.gc_mode] = |
439 | last_victim + p.ofs_unit; | |
4ce53776 | 440 | else |
da52f8ad | 441 | sm->last_victim[p.gc_mode] = segno + p.ofs_unit; |
04f0b2ea QS |
442 | sm->last_victim[p.gc_mode] %= |
443 | (MAIN_SECS(sbi) * sbi->segs_per_sec); | |
7bc09003 JK |
444 | break; |
445 | } | |
446 | } | |
7bc09003 | 447 | if (p.min_segno != NULL_SEGNO) { |
b2b3460a | 448 | got_it: |
e3080b01 CY |
449 | *result = (p.min_segno / p.ofs_unit) * p.ofs_unit; |
450 | got_result: | |
7bc09003 | 451 | if (p.alloc_mode == LFS) { |
4ddb1a4d | 452 | secno = GET_SEC_FROM_SEG(sbi, p.min_segno); |
5ec4e49f JK |
453 | if (gc_type == FG_GC) |
454 | sbi->cur_victim_sec = secno; | |
455 | else | |
456 | set_bit(secno, dirty_i->victim_secmap); | |
7bc09003 | 457 | } |
97767500 | 458 | ret = 0; |
8e46b3ed | 459 | |
e3c59108 ST |
460 | } |
461 | out: | |
462 | if (p.min_segno != NULL_SEGNO) | |
8e46b3ed NJ |
463 | trace_f2fs_get_victim(sbi->sb, type, gc_type, &p, |
464 | sbi->cur_victim_sec, | |
465 | prefree_segments(sbi), free_segments(sbi)); | |
7bc09003 JK |
466 | mutex_unlock(&dirty_i->seglist_lock); |
467 | ||
97767500 | 468 | return ret; |
7bc09003 JK |
469 | } |
470 | ||
471 | static const struct victim_selection default_v_ops = { | |
472 | .get_victim = get_victim_by_default, | |
473 | }; | |
474 | ||
7dda2af8 | 475 | static struct inode *find_gc_inode(struct gc_inode_list *gc_list, nid_t ino) |
7bc09003 | 476 | { |
7bc09003 JK |
477 | struct inode_entry *ie; |
478 | ||
7dda2af8 CL |
479 | ie = radix_tree_lookup(&gc_list->iroot, ino); |
480 | if (ie) | |
481 | return ie->inode; | |
7bc09003 JK |
482 | return NULL; |
483 | } | |
484 | ||
7dda2af8 | 485 | static void add_gc_inode(struct gc_inode_list *gc_list, struct inode *inode) |
7bc09003 | 486 | { |
6cc4af56 GZ |
487 | struct inode_entry *new_ie; |
488 | ||
7dda2af8 | 489 | if (inode == find_gc_inode(gc_list, inode->i_ino)) { |
6cc4af56 GZ |
490 | iput(inode); |
491 | return; | |
7bc09003 | 492 | } |
4d57b86d | 493 | new_ie = f2fs_kmem_cache_alloc(f2fs_inode_entry_slab, GFP_NOFS); |
7bc09003 | 494 | new_ie->inode = inode; |
f28e5034 CY |
495 | |
496 | f2fs_radix_tree_insert(&gc_list->iroot, inode->i_ino, new_ie); | |
7dda2af8 | 497 | list_add_tail(&new_ie->list, &gc_list->ilist); |
7bc09003 JK |
498 | } |
499 | ||
7dda2af8 | 500 | static void put_gc_inode(struct gc_inode_list *gc_list) |
7bc09003 JK |
501 | { |
502 | struct inode_entry *ie, *next_ie; | |
7dda2af8 CL |
503 | list_for_each_entry_safe(ie, next_ie, &gc_list->ilist, list) { |
504 | radix_tree_delete(&gc_list->iroot, ie->inode->i_ino); | |
7bc09003 JK |
505 | iput(ie->inode); |
506 | list_del(&ie->list); | |
4d57b86d | 507 | kmem_cache_free(f2fs_inode_entry_slab, ie); |
7bc09003 JK |
508 | } |
509 | } | |
510 | ||
511 | static int check_valid_map(struct f2fs_sb_info *sbi, | |
512 | unsigned int segno, int offset) | |
513 | { | |
514 | struct sit_info *sit_i = SIT_I(sbi); | |
515 | struct seg_entry *sentry; | |
516 | int ret; | |
517 | ||
3d26fa6b | 518 | down_read(&sit_i->sentry_lock); |
7bc09003 JK |
519 | sentry = get_seg_entry(sbi, segno); |
520 | ret = f2fs_test_bit(offset, sentry->cur_valid_map); | |
3d26fa6b | 521 | up_read(&sit_i->sentry_lock); |
43727527 | 522 | return ret; |
7bc09003 JK |
523 | } |
524 | ||
0a8165d7 | 525 | /* |
7bc09003 JK |
526 | * This function compares node address got in summary with that in NAT. |
527 | * On validity, copy that node with cold status, otherwise (invalid node) | |
528 | * ignore that. | |
529 | */ | |
48018b4c | 530 | static int gc_node_segment(struct f2fs_sb_info *sbi, |
7bc09003 JK |
531 | struct f2fs_summary *sum, unsigned int segno, int gc_type) |
532 | { | |
7bc09003 | 533 | struct f2fs_summary *entry; |
26d58599 | 534 | block_t start_addr; |
7bc09003 | 535 | int off; |
7ea984b0 | 536 | int phase = 0; |
c29fd0c0 | 537 | bool fggc = (gc_type == FG_GC); |
48018b4c | 538 | int submitted = 0; |
7bc09003 | 539 | |
26d58599 JK |
540 | start_addr = START_BLOCK(sbi, segno); |
541 | ||
7bc09003 JK |
542 | next_step: |
543 | entry = sum; | |
c718379b | 544 | |
c29fd0c0 CY |
545 | if (fggc && phase == 2) |
546 | atomic_inc(&sbi->wb_sync_req[NODE]); | |
547 | ||
7bc09003 JK |
548 | for (off = 0; off < sbi->blocks_per_seg; off++, entry++) { |
549 | nid_t nid = le32_to_cpu(entry->nid); | |
550 | struct page *node_page; | |
26d58599 | 551 | struct node_info ni; |
48018b4c | 552 | int err; |
7bc09003 | 553 | |
43727527 | 554 | /* stop BG_GC if there is not enough free sections. */ |
7f3037a5 | 555 | if (gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) |
48018b4c | 556 | return submitted; |
7bc09003 | 557 | |
43727527 | 558 | if (check_valid_map(sbi, segno, off) == 0) |
7bc09003 JK |
559 | continue; |
560 | ||
7ea984b0 | 561 | if (phase == 0) { |
4d57b86d | 562 | f2fs_ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), 1, |
7ea984b0 CY |
563 | META_NAT, true); |
564 | continue; | |
565 | } | |
566 | ||
567 | if (phase == 1) { | |
4d57b86d | 568 | f2fs_ra_node_page(sbi, nid); |
7bc09003 JK |
569 | continue; |
570 | } | |
7ea984b0 CY |
571 | |
572 | /* phase == 2 */ | |
4d57b86d | 573 | node_page = f2fs_get_node_page(sbi, nid); |
7bc09003 JK |
574 | if (IS_ERR(node_page)) |
575 | continue; | |
576 | ||
4d57b86d | 577 | /* block may become invalid during f2fs_get_node_page */ |
9a01b56b HY |
578 | if (check_valid_map(sbi, segno, off) == 0) { |
579 | f2fs_put_page(node_page, 1); | |
580 | continue; | |
26d58599 JK |
581 | } |
582 | ||
7735730d CY |
583 | if (f2fs_get_node_info(sbi, nid, &ni)) { |
584 | f2fs_put_page(node_page, 1); | |
585 | continue; | |
586 | } | |
587 | ||
26d58599 JK |
588 | if (ni.blk_addr != start_addr + off) { |
589 | f2fs_put_page(node_page, 1); | |
590 | continue; | |
9a01b56b HY |
591 | } |
592 | ||
48018b4c CY |
593 | err = f2fs_move_node_page(node_page, gc_type); |
594 | if (!err && gc_type == FG_GC) | |
595 | submitted++; | |
e1235983 | 596 | stat_inc_node_blk_count(sbi, 1, gc_type); |
7bc09003 | 597 | } |
c718379b | 598 | |
7ea984b0 | 599 | if (++phase < 3) |
7bc09003 | 600 | goto next_step; |
c29fd0c0 CY |
601 | |
602 | if (fggc) | |
603 | atomic_dec(&sbi->wb_sync_req[NODE]); | |
48018b4c | 604 | return submitted; |
7bc09003 JK |
605 | } |
606 | ||
0a8165d7 | 607 | /* |
9af45ef5 JK |
608 | * Calculate start block index indicating the given node offset. |
609 | * Be careful, caller should give this node offset only indicating direct node | |
610 | * blocks. If any node offsets, which point the other types of node blocks such | |
611 | * as indirect or double indirect node blocks, are given, it must be a caller's | |
612 | * bug. | |
7bc09003 | 613 | */ |
4d57b86d | 614 | block_t f2fs_start_bidx_of_node(unsigned int node_ofs, struct inode *inode) |
7bc09003 | 615 | { |
ce19a5d4 JK |
616 | unsigned int indirect_blks = 2 * NIDS_PER_BLOCK + 4; |
617 | unsigned int bidx; | |
7bc09003 | 618 | |
ce19a5d4 JK |
619 | if (node_ofs == 0) |
620 | return 0; | |
7bc09003 | 621 | |
ce19a5d4 | 622 | if (node_ofs <= 2) { |
7bc09003 JK |
623 | bidx = node_ofs - 1; |
624 | } else if (node_ofs <= indirect_blks) { | |
ce19a5d4 | 625 | int dec = (node_ofs - 4) / (NIDS_PER_BLOCK + 1); |
7bc09003 JK |
626 | bidx = node_ofs - 2 - dec; |
627 | } else { | |
ce19a5d4 | 628 | int dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1); |
7bc09003 JK |
629 | bidx = node_ofs - 5 - dec; |
630 | } | |
d02a6e61 | 631 | return bidx * ADDRS_PER_BLOCK(inode) + ADDRS_PER_INODE(inode); |
7bc09003 JK |
632 | } |
633 | ||
c1079892 | 634 | static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, |
7bc09003 JK |
635 | struct node_info *dni, block_t blkaddr, unsigned int *nofs) |
636 | { | |
637 | struct page *node_page; | |
638 | nid_t nid; | |
639 | unsigned int ofs_in_node; | |
640 | block_t source_blkaddr; | |
641 | ||
642 | nid = le32_to_cpu(sum->nid); | |
643 | ofs_in_node = le16_to_cpu(sum->ofs_in_node); | |
644 | ||
4d57b86d | 645 | node_page = f2fs_get_node_page(sbi, nid); |
7bc09003 | 646 | if (IS_ERR(node_page)) |
c1079892 | 647 | return false; |
7bc09003 | 648 | |
7735730d CY |
649 | if (f2fs_get_node_info(sbi, nid, dni)) { |
650 | f2fs_put_page(node_page, 1); | |
651 | return false; | |
652 | } | |
7bc09003 JK |
653 | |
654 | if (sum->version != dni->version) { | |
dcbb4c10 JP |
655 | f2fs_warn(sbi, "%s: valid data with mismatched node version.", |
656 | __func__); | |
c13ff37e | 657 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
7bc09003 JK |
658 | } |
659 | ||
660 | *nofs = ofs_of_node(node_page); | |
a2ced1ce | 661 | source_blkaddr = data_blkaddr(NULL, node_page, ofs_in_node); |
7bc09003 JK |
662 | f2fs_put_page(node_page, 1); |
663 | ||
bbf9f7d9 ST |
664 | if (source_blkaddr != blkaddr) { |
665 | #ifdef CONFIG_F2FS_CHECK_FS | |
666 | unsigned int segno = GET_SEGNO(sbi, blkaddr); | |
667 | unsigned long offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); | |
668 | ||
669 | if (unlikely(check_valid_map(sbi, segno, offset))) { | |
670 | if (!test_and_set_bit(segno, SIT_I(sbi)->invalid_segmap)) { | |
671 | f2fs_err(sbi, "mismatched blkaddr %u (source_blkaddr %u) in seg %u\n", | |
672 | blkaddr, source_blkaddr, segno); | |
673 | f2fs_bug_on(sbi, 1); | |
674 | } | |
675 | } | |
676 | #endif | |
c1079892 | 677 | return false; |
bbf9f7d9 | 678 | } |
c1079892 | 679 | return true; |
7bc09003 JK |
680 | } |
681 | ||
6aa58d8a CY |
682 | static int ra_data_block(struct inode *inode, pgoff_t index) |
683 | { | |
684 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
685 | struct address_space *mapping = inode->i_mapping; | |
686 | struct dnode_of_data dn; | |
687 | struct page *page; | |
688 | struct extent_info ei = {0, 0, 0}; | |
689 | struct f2fs_io_info fio = { | |
690 | .sbi = sbi, | |
691 | .ino = inode->i_ino, | |
692 | .type = DATA, | |
693 | .temp = COLD, | |
694 | .op = REQ_OP_READ, | |
695 | .op_flags = 0, | |
696 | .encrypted_page = NULL, | |
697 | .in_list = false, | |
698 | .retry = false, | |
699 | }; | |
700 | int err; | |
701 | ||
702 | page = f2fs_grab_cache_page(mapping, index, true); | |
703 | if (!page) | |
704 | return -ENOMEM; | |
705 | ||
706 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
707 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
93770ab7 CY |
708 | if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr, |
709 | DATA_GENERIC_ENHANCE_READ))) { | |
10f966bb | 710 | err = -EFSCORRUPTED; |
93770ab7 CY |
711 | goto put_page; |
712 | } | |
6aa58d8a CY |
713 | goto got_it; |
714 | } | |
715 | ||
716 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
717 | err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
718 | if (err) | |
719 | goto put_page; | |
720 | f2fs_put_dnode(&dn); | |
721 | ||
93770ab7 CY |
722 | if (!__is_valid_data_blkaddr(dn.data_blkaddr)) { |
723 | err = -ENOENT; | |
724 | goto put_page; | |
725 | } | |
6aa58d8a | 726 | if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr, |
93770ab7 | 727 | DATA_GENERIC_ENHANCE))) { |
10f966bb | 728 | err = -EFSCORRUPTED; |
6aa58d8a CY |
729 | goto put_page; |
730 | } | |
731 | got_it: | |
732 | /* read page */ | |
733 | fio.page = page; | |
734 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; | |
735 | ||
9bf1a3f7 YS |
736 | /* |
737 | * don't cache encrypted data into meta inode until previous dirty | |
738 | * data were writebacked to avoid racing between GC and flush. | |
739 | */ | |
bae0ee7a | 740 | f2fs_wait_on_page_writeback(page, DATA, true, true); |
9bf1a3f7 YS |
741 | |
742 | f2fs_wait_on_block_writeback(inode, dn.data_blkaddr); | |
743 | ||
6aa58d8a CY |
744 | fio.encrypted_page = f2fs_pagecache_get_page(META_MAPPING(sbi), |
745 | dn.data_blkaddr, | |
746 | FGP_LOCK | FGP_CREAT, GFP_NOFS); | |
747 | if (!fio.encrypted_page) { | |
748 | err = -ENOMEM; | |
749 | goto put_page; | |
750 | } | |
751 | ||
752 | err = f2fs_submit_page_bio(&fio); | |
753 | if (err) | |
754 | goto put_encrypted_page; | |
755 | f2fs_put_page(fio.encrypted_page, 0); | |
756 | f2fs_put_page(page, 1); | |
8b83ac81 CY |
757 | |
758 | f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE); | |
9c122384 | 759 | f2fs_update_iostat(sbi, FS_GDATA_READ_IO, F2FS_BLKSIZE); |
8b83ac81 | 760 | |
6aa58d8a CY |
761 | return 0; |
762 | put_encrypted_page: | |
763 | f2fs_put_page(fio.encrypted_page, 1); | |
764 | put_page: | |
765 | f2fs_put_page(page, 1); | |
766 | return err; | |
767 | } | |
768 | ||
d4c759ee JK |
769 | /* |
770 | * Move data block via META_MAPPING while keeping locked data page. | |
771 | * This can be used to move blocks, aka LBAs, directly on disk. | |
772 | */ | |
48018b4c | 773 | static int move_data_block(struct inode *inode, block_t bidx, |
2ef79ecb | 774 | int gc_type, unsigned int segno, int off) |
4375a336 JK |
775 | { |
776 | struct f2fs_io_info fio = { | |
777 | .sbi = F2FS_I_SB(inode), | |
39d787be | 778 | .ino = inode->i_ino, |
4375a336 | 779 | .type = DATA, |
a912b54d | 780 | .temp = COLD, |
04d328de | 781 | .op = REQ_OP_READ, |
70fd7614 | 782 | .op_flags = 0, |
4375a336 | 783 | .encrypted_page = NULL, |
fb830fc5 | 784 | .in_list = false, |
fe16efe6 | 785 | .retry = false, |
4375a336 JK |
786 | }; |
787 | struct dnode_of_data dn; | |
788 | struct f2fs_summary sum; | |
789 | struct node_info ni; | |
6aa58d8a | 790 | struct page *page, *mpage; |
4356e48e | 791 | block_t newaddr; |
48018b4c | 792 | int err = 0; |
b0332a0f | 793 | bool lfs_mode = f2fs_lfs_mode(fio.sbi); |
4375a336 JK |
794 | |
795 | /* do not read out */ | |
a56c7c6f | 796 | page = f2fs_grab_cache_page(inode->i_mapping, bidx, false); |
4375a336 | 797 | if (!page) |
48018b4c | 798 | return -ENOMEM; |
4375a336 | 799 | |
48018b4c CY |
800 | if (!check_valid_map(F2FS_I_SB(inode), segno, off)) { |
801 | err = -ENOENT; | |
20614711 | 802 | goto out; |
48018b4c | 803 | } |
20614711 | 804 | |
2ef79ecb CY |
805 | if (f2fs_is_atomic_file(inode)) { |
806 | F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++; | |
807 | F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++; | |
48018b4c | 808 | err = -EAGAIN; |
5fe45743 | 809 | goto out; |
2ef79ecb | 810 | } |
5fe45743 | 811 | |
1ad71a27 JK |
812 | if (f2fs_is_pinned_file(inode)) { |
813 | f2fs_pin_file_control(inode, true); | |
48018b4c | 814 | err = -EAGAIN; |
1ad71a27 JK |
815 | goto out; |
816 | } | |
817 | ||
4375a336 | 818 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
4d57b86d | 819 | err = f2fs_get_dnode_of_data(&dn, bidx, LOOKUP_NODE); |
4375a336 JK |
820 | if (err) |
821 | goto out; | |
822 | ||
08b39fbd CY |
823 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
824 | ClearPageUptodate(page); | |
48018b4c | 825 | err = -ENOENT; |
4375a336 | 826 | goto put_out; |
08b39fbd CY |
827 | } |
828 | ||
829 | /* | |
830 | * don't cache encrypted data into meta inode until previous dirty | |
831 | * data were writebacked to avoid racing between GC and flush. | |
832 | */ | |
bae0ee7a | 833 | f2fs_wait_on_page_writeback(page, DATA, true, true); |
4375a336 | 834 | |
9bf1a3f7 YS |
835 | f2fs_wait_on_block_writeback(inode, dn.data_blkaddr); |
836 | ||
7735730d CY |
837 | err = f2fs_get_node_info(fio.sbi, dn.nid, &ni); |
838 | if (err) | |
839 | goto put_out; | |
840 | ||
4375a336 JK |
841 | set_summary(&sum, dn.nid, dn.ofs_in_node, ni.version); |
842 | ||
843 | /* read page */ | |
844 | fio.page = page; | |
7a9d7548 | 845 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
4375a336 | 846 | |
107a805d CY |
847 | if (lfs_mode) |
848 | down_write(&fio.sbi->io_order_lock); | |
849 | ||
543b8c46 JK |
850 | mpage = f2fs_grab_cache_page(META_MAPPING(fio.sbi), |
851 | fio.old_blkaddr, false); | |
d7cd3702 CY |
852 | if (!mpage) { |
853 | err = -ENOMEM; | |
543b8c46 | 854 | goto up_out; |
d7cd3702 | 855 | } |
543b8c46 JK |
856 | |
857 | fio.encrypted_page = mpage; | |
858 | ||
859 | /* read source block in mpage */ | |
860 | if (!PageUptodate(mpage)) { | |
861 | err = f2fs_submit_page_bio(&fio); | |
862 | if (err) { | |
863 | f2fs_put_page(mpage, 1); | |
864 | goto up_out; | |
865 | } | |
8b83ac81 CY |
866 | |
867 | f2fs_update_iostat(fio.sbi, FS_DATA_READ_IO, F2FS_BLKSIZE); | |
9c122384 | 868 | f2fs_update_iostat(fio.sbi, FS_GDATA_READ_IO, F2FS_BLKSIZE); |
8b83ac81 | 869 | |
543b8c46 JK |
870 | lock_page(mpage); |
871 | if (unlikely(mpage->mapping != META_MAPPING(fio.sbi) || | |
872 | !PageUptodate(mpage))) { | |
873 | err = -EIO; | |
874 | f2fs_put_page(mpage, 1); | |
875 | goto up_out; | |
876 | } | |
877 | } | |
878 | ||
4d57b86d | 879 | f2fs_allocate_data_block(fio.sbi, NULL, fio.old_blkaddr, &newaddr, |
f608c38c | 880 | &sum, CURSEG_COLD_DATA, NULL); |
4356e48e | 881 | |
01eccef7 CY |
882 | fio.encrypted_page = f2fs_pagecache_get_page(META_MAPPING(fio.sbi), |
883 | newaddr, FGP_LOCK | FGP_CREAT, GFP_NOFS); | |
4356e48e CY |
884 | if (!fio.encrypted_page) { |
885 | err = -ENOMEM; | |
6aa58d8a | 886 | f2fs_put_page(mpage, 1); |
543b8c46 | 887 | goto recover_block; |
4356e48e | 888 | } |
548aedac | 889 | |
543b8c46 | 890 | /* write target block */ |
bae0ee7a | 891 | f2fs_wait_on_page_writeback(fio.encrypted_page, DATA, true, true); |
543b8c46 JK |
892 | memcpy(page_address(fio.encrypted_page), |
893 | page_address(mpage), PAGE_SIZE); | |
894 | f2fs_put_page(mpage, 1); | |
895 | invalidate_mapping_pages(META_MAPPING(fio.sbi), | |
896 | fio.old_blkaddr, fio.old_blkaddr); | |
897 | ||
8d64d365 | 898 | set_page_dirty(fio.encrypted_page); |
6282adbf JK |
899 | if (clear_page_dirty_for_io(fio.encrypted_page)) |
900 | dec_page_count(fio.sbi, F2FS_DIRTY_META); | |
901 | ||
548aedac | 902 | set_page_writeback(fio.encrypted_page); |
17c50035 | 903 | ClearPageError(page); |
4375a336 JK |
904 | |
905 | /* allocate block address */ | |
bae0ee7a | 906 | f2fs_wait_on_page_writeback(dn.node_page, NODE, true, true); |
4356e48e | 907 | |
04d328de | 908 | fio.op = REQ_OP_WRITE; |
70fd7614 | 909 | fio.op_flags = REQ_SYNC; |
4356e48e | 910 | fio.new_blkaddr = newaddr; |
fe16efe6 CY |
911 | f2fs_submit_page_write(&fio); |
912 | if (fio.retry) { | |
48018b4c | 913 | err = -EAGAIN; |
a9d572c7 SY |
914 | if (PageWriteback(fio.encrypted_page)) |
915 | end_page_writeback(fio.encrypted_page); | |
916 | goto put_page_out; | |
917 | } | |
4375a336 | 918 | |
b0af6d49 CY |
919 | f2fs_update_iostat(fio.sbi, FS_GC_DATA_IO, F2FS_BLKSIZE); |
920 | ||
f28b3434 | 921 | f2fs_update_data_blkaddr(&dn, newaddr); |
91942321 | 922 | set_inode_flag(inode, FI_APPEND_WRITE); |
4375a336 | 923 | if (page->index == 0) |
91942321 | 924 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
548aedac | 925 | put_page_out: |
4375a336 | 926 | f2fs_put_page(fio.encrypted_page, 1); |
4356e48e CY |
927 | recover_block: |
928 | if (err) | |
4d57b86d | 929 | f2fs_do_replace_block(fio.sbi, &sum, newaddr, fio.old_blkaddr, |
4356e48e | 930 | true, true); |
543b8c46 JK |
931 | up_out: |
932 | if (lfs_mode) | |
933 | up_write(&fio.sbi->io_order_lock); | |
4375a336 JK |
934 | put_out: |
935 | f2fs_put_dnode(&dn); | |
936 | out: | |
937 | f2fs_put_page(page, 1); | |
48018b4c | 938 | return err; |
4375a336 JK |
939 | } |
940 | ||
48018b4c | 941 | static int move_data_page(struct inode *inode, block_t bidx, int gc_type, |
20614711 | 942 | unsigned int segno, int off) |
7bc09003 | 943 | { |
c879f90d | 944 | struct page *page; |
48018b4c | 945 | int err = 0; |
c879f90d | 946 | |
4d57b86d | 947 | page = f2fs_get_lock_data_page(inode, bidx, true); |
c879f90d | 948 | if (IS_ERR(page)) |
48018b4c | 949 | return PTR_ERR(page); |
63a0b7cb | 950 | |
48018b4c CY |
951 | if (!check_valid_map(F2FS_I_SB(inode), segno, off)) { |
952 | err = -ENOENT; | |
20614711 | 953 | goto out; |
48018b4c | 954 | } |
20614711 | 955 | |
2ef79ecb CY |
956 | if (f2fs_is_atomic_file(inode)) { |
957 | F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++; | |
958 | F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++; | |
48018b4c | 959 | err = -EAGAIN; |
5fe45743 | 960 | goto out; |
2ef79ecb | 961 | } |
1ad71a27 JK |
962 | if (f2fs_is_pinned_file(inode)) { |
963 | if (gc_type == FG_GC) | |
964 | f2fs_pin_file_control(inode, true); | |
48018b4c | 965 | err = -EAGAIN; |
1ad71a27 JK |
966 | goto out; |
967 | } | |
5fe45743 | 968 | |
7bc09003 | 969 | if (gc_type == BG_GC) { |
48018b4c CY |
970 | if (PageWriteback(page)) { |
971 | err = -EAGAIN; | |
4ebefc44 | 972 | goto out; |
48018b4c | 973 | } |
7bc09003 JK |
974 | set_page_dirty(page); |
975 | set_cold_data(page); | |
976 | } else { | |
c879f90d JK |
977 | struct f2fs_io_info fio = { |
978 | .sbi = F2FS_I_SB(inode), | |
39d787be | 979 | .ino = inode->i_ino, |
c879f90d | 980 | .type = DATA, |
a912b54d | 981 | .temp = COLD, |
04d328de | 982 | .op = REQ_OP_WRITE, |
70fd7614 | 983 | .op_flags = REQ_SYNC, |
e959c8f5 | 984 | .old_blkaddr = NULL_ADDR, |
c879f90d | 985 | .page = page, |
4375a336 | 986 | .encrypted_page = NULL, |
cc15620b | 987 | .need_lock = LOCK_REQ, |
b0af6d49 | 988 | .io_type = FS_GC_DATA_IO, |
c879f90d | 989 | }; |
72e1c797 | 990 | bool is_dirty = PageDirty(page); |
72e1c797 CY |
991 | |
992 | retry: | |
bae0ee7a | 993 | f2fs_wait_on_page_writeback(page, DATA, true, true); |
8d64d365 CY |
994 | |
995 | set_page_dirty(page); | |
933439c8 | 996 | if (clear_page_dirty_for_io(page)) { |
a7ffdbe2 | 997 | inode_dec_dirty_pages(inode); |
4d57b86d | 998 | f2fs_remove_dirty_inode(inode); |
933439c8 | 999 | } |
72e1c797 | 1000 | |
7bc09003 | 1001 | set_cold_data(page); |
72e1c797 | 1002 | |
4d57b86d | 1003 | err = f2fs_do_write_data_page(&fio); |
14a28559 CY |
1004 | if (err) { |
1005 | clear_cold_data(page); | |
1006 | if (err == -ENOMEM) { | |
5df7731f CY |
1007 | congestion_wait(BLK_RW_ASYNC, |
1008 | DEFAULT_IO_TIMEOUT); | |
14a28559 CY |
1009 | goto retry; |
1010 | } | |
1011 | if (is_dirty) | |
1012 | set_page_dirty(page); | |
72e1c797 | 1013 | } |
7bc09003 JK |
1014 | } |
1015 | out: | |
1016 | f2fs_put_page(page, 1); | |
48018b4c | 1017 | return err; |
7bc09003 JK |
1018 | } |
1019 | ||
0a8165d7 | 1020 | /* |
7bc09003 JK |
1021 | * This function tries to get parent node of victim data block, and identifies |
1022 | * data block validity. If the block is valid, copy that with cold status and | |
1023 | * modify parent node. | |
1024 | * If the parent node is not valid or the data block address is different, | |
1025 | * the victim data block is ignored. | |
1026 | */ | |
48018b4c | 1027 | static int gc_data_segment(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, |
7dda2af8 | 1028 | struct gc_inode_list *gc_list, unsigned int segno, int gc_type) |
7bc09003 JK |
1029 | { |
1030 | struct super_block *sb = sbi->sb; | |
1031 | struct f2fs_summary *entry; | |
1032 | block_t start_addr; | |
43727527 | 1033 | int off; |
7bc09003 | 1034 | int phase = 0; |
48018b4c | 1035 | int submitted = 0; |
7bc09003 JK |
1036 | |
1037 | start_addr = START_BLOCK(sbi, segno); | |
1038 | ||
1039 | next_step: | |
1040 | entry = sum; | |
c718379b | 1041 | |
7bc09003 JK |
1042 | for (off = 0; off < sbi->blocks_per_seg; off++, entry++) { |
1043 | struct page *data_page; | |
1044 | struct inode *inode; | |
1045 | struct node_info dni; /* dnode info for the data */ | |
1046 | unsigned int ofs_in_node, nofs; | |
1047 | block_t start_bidx; | |
7ea984b0 | 1048 | nid_t nid = le32_to_cpu(entry->nid); |
7bc09003 | 1049 | |
803e74be JK |
1050 | /* |
1051 | * stop BG_GC if there is not enough free sections. | |
1052 | * Or, stop GC if the segment becomes fully valid caused by | |
1053 | * race condition along with SSR block allocation. | |
1054 | */ | |
1055 | if ((gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) || | |
2bac0763 JK |
1056 | get_valid_blocks(sbi, segno, true) == |
1057 | BLKS_PER_SEC(sbi)) | |
48018b4c | 1058 | return submitted; |
7bc09003 | 1059 | |
43727527 | 1060 | if (check_valid_map(sbi, segno, off) == 0) |
7bc09003 JK |
1061 | continue; |
1062 | ||
1063 | if (phase == 0) { | |
4d57b86d | 1064 | f2fs_ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), 1, |
7ea984b0 CY |
1065 | META_NAT, true); |
1066 | continue; | |
1067 | } | |
1068 | ||
1069 | if (phase == 1) { | |
4d57b86d | 1070 | f2fs_ra_node_page(sbi, nid); |
7bc09003 JK |
1071 | continue; |
1072 | } | |
1073 | ||
1074 | /* Get an inode by ino with checking validity */ | |
c1079892 | 1075 | if (!is_alive(sbi, entry, &dni, start_addr + off, &nofs)) |
7bc09003 JK |
1076 | continue; |
1077 | ||
7ea984b0 | 1078 | if (phase == 2) { |
4d57b86d | 1079 | f2fs_ra_node_page(sbi, dni.ino); |
7bc09003 JK |
1080 | continue; |
1081 | } | |
1082 | ||
7bc09003 JK |
1083 | ofs_in_node = le16_to_cpu(entry->ofs_in_node); |
1084 | ||
7ea984b0 | 1085 | if (phase == 3) { |
d4686d56 | 1086 | inode = f2fs_iget(sb, dni.ino); |
4eea93e3 JK |
1087 | if (IS_ERR(inode) || is_bad_inode(inode)) { |
1088 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
7bc09003 | 1089 | continue; |
4eea93e3 | 1090 | } |
7bc09003 | 1091 | |
bb06664a | 1092 | if (!down_write_trylock( |
b2532c69 | 1093 | &F2FS_I(inode)->i_gc_rwsem[WRITE])) { |
bb06664a | 1094 | iput(inode); |
6f8d4455 | 1095 | sbi->skipped_gc_rwsem++; |
bb06664a CY |
1096 | continue; |
1097 | } | |
1098 | ||
6aa58d8a CY |
1099 | start_bidx = f2fs_start_bidx_of_node(nofs, inode) + |
1100 | ofs_in_node; | |
1101 | ||
1102 | if (f2fs_post_read_required(inode)) { | |
1103 | int err = ra_data_block(inode, start_bidx); | |
1104 | ||
1105 | up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); | |
1106 | if (err) { | |
1107 | iput(inode); | |
1108 | continue; | |
1109 | } | |
1110 | add_gc_inode(gc_list, inode); | |
1111 | continue; | |
1112 | } | |
1113 | ||
4d57b86d | 1114 | data_page = f2fs_get_read_data_page(inode, |
6aa58d8a | 1115 | start_bidx, REQ_RAHEAD, true); |
b2532c69 | 1116 | up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
31a32688 CL |
1117 | if (IS_ERR(data_page)) { |
1118 | iput(inode); | |
1119 | continue; | |
1120 | } | |
7bc09003 JK |
1121 | |
1122 | f2fs_put_page(data_page, 0); | |
7dda2af8 | 1123 | add_gc_inode(gc_list, inode); |
31a32688 CL |
1124 | continue; |
1125 | } | |
1126 | ||
7ea984b0 | 1127 | /* phase 4 */ |
7dda2af8 | 1128 | inode = find_gc_inode(gc_list, dni.ino); |
31a32688 | 1129 | if (inode) { |
82e0a5aa CY |
1130 | struct f2fs_inode_info *fi = F2FS_I(inode); |
1131 | bool locked = false; | |
48018b4c | 1132 | int err; |
82e0a5aa CY |
1133 | |
1134 | if (S_ISREG(inode->i_mode)) { | |
b2532c69 | 1135 | if (!down_write_trylock(&fi->i_gc_rwsem[READ])) |
82e0a5aa CY |
1136 | continue; |
1137 | if (!down_write_trylock( | |
b2532c69 | 1138 | &fi->i_gc_rwsem[WRITE])) { |
6f8d4455 | 1139 | sbi->skipped_gc_rwsem++; |
b2532c69 | 1140 | up_write(&fi->i_gc_rwsem[READ]); |
82e0a5aa CY |
1141 | continue; |
1142 | } | |
1143 | locked = true; | |
73ac2f4e CY |
1144 | |
1145 | /* wait for all inflight aio data */ | |
1146 | inode_dio_wait(inode); | |
82e0a5aa CY |
1147 | } |
1148 | ||
4d57b86d | 1149 | start_bidx = f2fs_start_bidx_of_node(nofs, inode) |
c879f90d | 1150 | + ofs_in_node; |
6dbb1796 | 1151 | if (f2fs_post_read_required(inode)) |
48018b4c CY |
1152 | err = move_data_block(inode, start_bidx, |
1153 | gc_type, segno, off); | |
4375a336 | 1154 | else |
48018b4c | 1155 | err = move_data_page(inode, start_bidx, gc_type, |
d4c759ee | 1156 | segno, off); |
82e0a5aa | 1157 | |
48018b4c CY |
1158 | if (!err && (gc_type == FG_GC || |
1159 | f2fs_post_read_required(inode))) | |
1160 | submitted++; | |
1161 | ||
82e0a5aa | 1162 | if (locked) { |
b2532c69 CY |
1163 | up_write(&fi->i_gc_rwsem[WRITE]); |
1164 | up_write(&fi->i_gc_rwsem[READ]); | |
82e0a5aa CY |
1165 | } |
1166 | ||
e1235983 | 1167 | stat_inc_data_blk_count(sbi, 1, gc_type); |
7bc09003 | 1168 | } |
7bc09003 | 1169 | } |
c718379b | 1170 | |
7ea984b0 | 1171 | if (++phase < 5) |
7bc09003 | 1172 | goto next_step; |
48018b4c CY |
1173 | |
1174 | return submitted; | |
7bc09003 JK |
1175 | } |
1176 | ||
1177 | static int __get_victim(struct f2fs_sb_info *sbi, unsigned int *victim, | |
8a2d0ace | 1178 | int gc_type) |
7bc09003 JK |
1179 | { |
1180 | struct sit_info *sit_i = SIT_I(sbi); | |
1181 | int ret; | |
8a2d0ace | 1182 | |
3d26fa6b | 1183 | down_write(&sit_i->sentry_lock); |
8a2d0ace GZ |
1184 | ret = DIRTY_I(sbi)->v_ops->get_victim(sbi, victim, gc_type, |
1185 | NO_CHECK_TYPE, LFS); | |
3d26fa6b | 1186 | up_write(&sit_i->sentry_lock); |
7bc09003 JK |
1187 | return ret; |
1188 | } | |
1189 | ||
718e53fa CY |
1190 | static int do_garbage_collect(struct f2fs_sb_info *sbi, |
1191 | unsigned int start_segno, | |
7dda2af8 | 1192 | struct gc_inode_list *gc_list, int gc_type) |
7bc09003 JK |
1193 | { |
1194 | struct page *sum_page; | |
1195 | struct f2fs_summary_block *sum; | |
c718379b | 1196 | struct blk_plug plug; |
718e53fa CY |
1197 | unsigned int segno = start_segno; |
1198 | unsigned int end_segno = start_segno + sbi->segs_per_sec; | |
e3080b01 | 1199 | int seg_freed = 0, migrated = 0; |
718e53fa CY |
1200 | unsigned char type = IS_DATASEG(get_seg_entry(sbi, segno)->type) ? |
1201 | SUM_TYPE_DATA : SUM_TYPE_NODE; | |
48018b4c | 1202 | int submitted = 0; |
7bc09003 | 1203 | |
e3080b01 CY |
1204 | if (__is_large_section(sbi)) |
1205 | end_segno = rounddown(end_segno, sbi->segs_per_sec); | |
1206 | ||
718e53fa | 1207 | /* readahead multi ssa blocks those have contiguous address */ |
2c70c5e3 | 1208 | if (__is_large_section(sbi)) |
4d57b86d | 1209 | f2fs_ra_meta_pages(sbi, GET_SUM_BLOCK(sbi, segno), |
e3080b01 | 1210 | end_segno - segno, META_SSA, true); |
718e53fa CY |
1211 | |
1212 | /* reference all summary page */ | |
1213 | while (segno < end_segno) { | |
4d57b86d | 1214 | sum_page = f2fs_get_sum_page(sbi, segno++); |
edc55aaf JK |
1215 | if (IS_ERR(sum_page)) { |
1216 | int err = PTR_ERR(sum_page); | |
1217 | ||
1218 | end_segno = segno - 1; | |
1219 | for (segno = start_segno; segno < end_segno; segno++) { | |
1220 | sum_page = find_get_page(META_MAPPING(sbi), | |
1221 | GET_SUM_BLOCK(sbi, segno)); | |
1222 | f2fs_put_page(sum_page, 0); | |
1223 | f2fs_put_page(sum_page, 0); | |
1224 | } | |
1225 | return err; | |
1226 | } | |
718e53fa CY |
1227 | unlock_page(sum_page); |
1228 | } | |
7bc09003 | 1229 | |
c718379b JK |
1230 | blk_start_plug(&plug); |
1231 | ||
718e53fa | 1232 | for (segno = start_segno; segno < end_segno; segno++) { |
aa987273 | 1233 | |
718e53fa CY |
1234 | /* find segment summary of victim */ |
1235 | sum_page = find_get_page(META_MAPPING(sbi), | |
1236 | GET_SUM_BLOCK(sbi, segno)); | |
718e53fa | 1237 | f2fs_put_page(sum_page, 0); |
7bc09003 | 1238 | |
d6c66cd1 YS |
1239 | if (get_valid_blocks(sbi, segno, false) == 0) |
1240 | goto freed; | |
dabfbbc8 | 1241 | if (gc_type == BG_GC && __is_large_section(sbi) && |
e3080b01 CY |
1242 | migrated >= sbi->migration_granularity) |
1243 | goto skip; | |
d6c66cd1 | 1244 | if (!PageUptodate(sum_page) || unlikely(f2fs_cp_error(sbi))) |
e3080b01 | 1245 | goto skip; |
de0dcc40 | 1246 | |
718e53fa | 1247 | sum = page_address(sum_page); |
10d255c3 | 1248 | if (type != GET_SUM_TYPE((&sum->footer))) { |
dcbb4c10 JP |
1249 | f2fs_err(sbi, "Inconsistent segment (%u) type [%d, %d] in SSA and SIT", |
1250 | segno, type, GET_SUM_TYPE((&sum->footer))); | |
10d255c3 | 1251 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
793ab1c8 | 1252 | f2fs_stop_checkpoint(sbi, false); |
e3080b01 | 1253 | goto skip; |
10d255c3 | 1254 | } |
718e53fa CY |
1255 | |
1256 | /* | |
1257 | * this is to avoid deadlock: | |
1258 | * - lock_page(sum_page) - f2fs_replace_block | |
3d26fa6b CY |
1259 | * - check_valid_map() - down_write(sentry_lock) |
1260 | * - down_read(sentry_lock) - change_curseg() | |
718e53fa CY |
1261 | * - lock_page(sum_page) |
1262 | */ | |
718e53fa | 1263 | if (type == SUM_TYPE_NODE) |
48018b4c | 1264 | submitted += gc_node_segment(sbi, sum->entries, segno, |
718e53fa | 1265 | gc_type); |
48018b4c CY |
1266 | else |
1267 | submitted += gc_data_segment(sbi, sum->entries, gc_list, | |
1268 | segno, gc_type); | |
718e53fa CY |
1269 | |
1270 | stat_inc_seg_count(sbi, type, gc_type); | |
8c7b9ac1 | 1271 | migrated++; |
c56f16da | 1272 | |
d6c66cd1 | 1273 | freed: |
c56f16da CY |
1274 | if (gc_type == FG_GC && |
1275 | get_valid_blocks(sbi, segno, false) == 0) | |
1276 | seg_freed++; | |
e3080b01 CY |
1277 | |
1278 | if (__is_large_section(sbi) && segno + 1 < end_segno) | |
1279 | sbi->next_victim_seg[gc_type] = segno + 1; | |
1280 | skip: | |
718e53fa CY |
1281 | f2fs_put_page(sum_page, 0); |
1282 | } | |
1283 | ||
48018b4c | 1284 | if (submitted) |
b9109b0e JK |
1285 | f2fs_submit_merged_write(sbi, |
1286 | (type == SUM_TYPE_NODE) ? NODE : DATA); | |
c718379b | 1287 | |
718e53fa | 1288 | blk_finish_plug(&plug); |
7bc09003 | 1289 | |
17d899df CY |
1290 | stat_inc_call_count(sbi->stat_info); |
1291 | ||
c56f16da | 1292 | return seg_freed; |
7bc09003 JK |
1293 | } |
1294 | ||
e066b83c JK |
1295 | int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, |
1296 | bool background, unsigned int segno) | |
7bc09003 | 1297 | { |
d530d4d8 | 1298 | int gc_type = sync ? FG_GC : BG_GC; |
c56f16da CY |
1299 | int sec_freed = 0, seg_freed = 0, total_freed = 0; |
1300 | int ret = 0; | |
d5053a34 | 1301 | struct cp_control cpc; |
e066b83c | 1302 | unsigned int init_segno = segno; |
7dda2af8 CL |
1303 | struct gc_inode_list gc_list = { |
1304 | .ilist = LIST_HEAD_INIT(gc_list.ilist), | |
f6bb2a2c | 1305 | .iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS), |
7dda2af8 | 1306 | }; |
2ef79ecb | 1307 | unsigned long long last_skipped = sbi->skipped_atomic_files[FG_GC]; |
6f8d4455 | 1308 | unsigned long long first_skipped; |
2ef79ecb | 1309 | unsigned int skipped_round = 0, round = 0; |
d5053a34 | 1310 | |
c56f16da CY |
1311 | trace_f2fs_gc_begin(sbi->sb, sync, background, |
1312 | get_pages(sbi, F2FS_DIRTY_NODES), | |
1313 | get_pages(sbi, F2FS_DIRTY_DENTS), | |
1314 | get_pages(sbi, F2FS_DIRTY_IMETA), | |
1315 | free_sections(sbi), | |
1316 | free_segments(sbi), | |
1317 | reserved_segments(sbi), | |
1318 | prefree_segments(sbi)); | |
1319 | ||
119ee914 | 1320 | cpc.reason = __get_cp_reason(sbi); |
6f8d4455 JK |
1321 | sbi->skipped_gc_rwsem = 0; |
1322 | first_skipped = last_skipped; | |
7bc09003 | 1323 | gc_more: |
1751e8a6 | 1324 | if (unlikely(!(sbi->sb->s_flags & SB_ACTIVE))) { |
e5dbd956 | 1325 | ret = -EINVAL; |
408e9375 | 1326 | goto stop; |
e5dbd956 | 1327 | } |
6d5a1495 CY |
1328 | if (unlikely(f2fs_cp_error(sbi))) { |
1329 | ret = -EIO; | |
203681f6 | 1330 | goto stop; |
6d5a1495 | 1331 | } |
7bc09003 | 1332 | |
19f4e688 | 1333 | if (gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) { |
6e17bfbc | 1334 | /* |
19f4e688 HP |
1335 | * For example, if there are many prefree_segments below given |
1336 | * threshold, we can make them free by checkpoint. Then, we | |
1337 | * secure free segments which doesn't need fggc any more. | |
6e17bfbc | 1338 | */ |
4354994f DR |
1339 | if (prefree_segments(sbi) && |
1340 | !is_sbi_flag_set(sbi, SBI_CP_DISABLED)) { | |
4d57b86d | 1341 | ret = f2fs_write_checkpoint(sbi, &cpc); |
8fd5a37e JK |
1342 | if (ret) |
1343 | goto stop; | |
1344 | } | |
19f4e688 HP |
1345 | if (has_not_enough_free_secs(sbi, 0, 0)) |
1346 | gc_type = FG_GC; | |
d64f8047 | 1347 | } |
7bc09003 | 1348 | |
19f4e688 | 1349 | /* f2fs_balance_fs doesn't need to do BG_GC in critical path. */ |
c56f16da CY |
1350 | if (gc_type == BG_GC && !background) { |
1351 | ret = -EINVAL; | |
19f4e688 | 1352 | goto stop; |
c56f16da | 1353 | } |
97767500 QZ |
1354 | ret = __get_victim(sbi, &segno, gc_type); |
1355 | if (ret) | |
408e9375 | 1356 | goto stop; |
7bc09003 | 1357 | |
c56f16da CY |
1358 | seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type); |
1359 | if (gc_type == FG_GC && seg_freed == sbi->segs_per_sec) | |
45fe8492 | 1360 | sec_freed++; |
c56f16da | 1361 | total_freed += seg_freed; |
43727527 | 1362 | |
2ef79ecb | 1363 | if (gc_type == FG_GC) { |
6f8d4455 JK |
1364 | if (sbi->skipped_atomic_files[FG_GC] > last_skipped || |
1365 | sbi->skipped_gc_rwsem) | |
2ef79ecb CY |
1366 | skipped_round++; |
1367 | last_skipped = sbi->skipped_atomic_files[FG_GC]; | |
1368 | round++; | |
1369 | } | |
1370 | ||
957fa478 | 1371 | if (gc_type == FG_GC && seg_freed) |
5ec4e49f | 1372 | sbi->cur_victim_sec = NULL_SEGNO; |
43727527 | 1373 | |
6f8d4455 JK |
1374 | if (sync) |
1375 | goto stop; | |
1376 | ||
1377 | if (has_not_enough_free_secs(sbi, sec_freed, 0)) { | |
1378 | if (skipped_round <= MAX_SKIP_GC_COUNT || | |
1379 | skipped_round * 2 < round) { | |
e066b83c | 1380 | segno = NULL_SEGNO; |
d530d4d8 | 1381 | goto gc_more; |
e066b83c | 1382 | } |
43727527 | 1383 | |
6f8d4455 JK |
1384 | if (first_skipped < last_skipped && |
1385 | (last_skipped - first_skipped) > | |
1386 | sbi->skipped_gc_rwsem) { | |
1387 | f2fs_drop_inmem_pages_all(sbi, true); | |
1388 | segno = NULL_SEGNO; | |
1389 | goto gc_more; | |
1390 | } | |
4354994f | 1391 | if (gc_type == FG_GC && !is_sbi_flag_set(sbi, SBI_CP_DISABLED)) |
4d57b86d | 1392 | ret = f2fs_write_checkpoint(sbi, &cpc); |
d530d4d8 | 1393 | } |
408e9375 | 1394 | stop: |
e066b83c JK |
1395 | SIT_I(sbi)->last_victim[ALLOC_NEXT] = 0; |
1396 | SIT_I(sbi)->last_victim[FLUSH_DEVICE] = init_segno; | |
c56f16da CY |
1397 | |
1398 | trace_f2fs_gc_end(sbi->sb, ret, total_freed, sec_freed, | |
1399 | get_pages(sbi, F2FS_DIRTY_NODES), | |
1400 | get_pages(sbi, F2FS_DIRTY_DENTS), | |
1401 | get_pages(sbi, F2FS_DIRTY_IMETA), | |
1402 | free_sections(sbi), | |
1403 | free_segments(sbi), | |
1404 | reserved_segments(sbi), | |
1405 | prefree_segments(sbi)); | |
1406 | ||
fb24fea7 | 1407 | up_write(&sbi->gc_lock); |
7bc09003 | 1408 | |
7dda2af8 | 1409 | put_gc_inode(&gc_list); |
d530d4d8 | 1410 | |
61f7725a | 1411 | if (sync && !ret) |
d530d4d8 | 1412 | ret = sec_freed ? 0 : -EAGAIN; |
43727527 | 1413 | return ret; |
7bc09003 JK |
1414 | } |
1415 | ||
4d57b86d | 1416 | void f2fs_build_gc_manager(struct f2fs_sb_info *sbi) |
7bc09003 JK |
1417 | { |
1418 | DIRTY_I(sbi)->v_ops = &default_v_ops; | |
e93b9865 | 1419 | |
1ad71a27 | 1420 | sbi->gc_pin_file_threshold = DEF_GC_FAILED_PINNED_FILES; |
d5793249 JK |
1421 | |
1422 | /* give warm/cold data area from slower device */ | |
0916878d | 1423 | if (f2fs_is_multi_device(sbi) && !__is_large_section(sbi)) |
d5793249 JK |
1424 | SIT_I(sbi)->last_victim[ALLOC_NEXT] = |
1425 | GET_SEGNO(sbi, FDEV(0).end_blk) + 1; | |
7bc09003 | 1426 | } |
04f0b2ea | 1427 | |
b4b10061 JK |
1428 | static int free_segment_range(struct f2fs_sb_info *sbi, |
1429 | unsigned int secs, bool gc_only) | |
04f0b2ea | 1430 | { |
b4b10061 JK |
1431 | unsigned int segno, next_inuse, start, end; |
1432 | struct cp_control cpc = { CP_RESIZE, 0, 0, 0 }; | |
1433 | int gc_mode, gc_type; | |
04f0b2ea | 1434 | int err = 0; |
b4b10061 JK |
1435 | int type; |
1436 | ||
1437 | /* Force block allocation for GC */ | |
1438 | MAIN_SECS(sbi) -= secs; | |
1439 | start = MAIN_SECS(sbi) * sbi->segs_per_sec; | |
1440 | end = MAIN_SEGS(sbi) - 1; | |
1441 | ||
1442 | mutex_lock(&DIRTY_I(sbi)->seglist_lock); | |
1443 | for (gc_mode = 0; gc_mode < MAX_GC_POLICY; gc_mode++) | |
1444 | if (SIT_I(sbi)->last_victim[gc_mode] >= start) | |
1445 | SIT_I(sbi)->last_victim[gc_mode] = 0; | |
1446 | ||
1447 | for (gc_type = BG_GC; gc_type <= FG_GC; gc_type++) | |
1448 | if (sbi->next_victim_seg[gc_type] >= start) | |
1449 | sbi->next_victim_seg[gc_type] = NULL_SEGNO; | |
1450 | mutex_unlock(&DIRTY_I(sbi)->seglist_lock); | |
04f0b2ea QS |
1451 | |
1452 | /* Move out cursegs from the target range */ | |
1453 | for (type = CURSEG_HOT_DATA; type < NR_CURSEG_TYPE; type++) | |
0ef81833 | 1454 | f2fs_allocate_segment_for_resize(sbi, type, start, end); |
04f0b2ea QS |
1455 | |
1456 | /* do GC to move out valid blocks in the range */ | |
1457 | for (segno = start; segno <= end; segno += sbi->segs_per_sec) { | |
1458 | struct gc_inode_list gc_list = { | |
1459 | .ilist = LIST_HEAD_INIT(gc_list.ilist), | |
1460 | .iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS), | |
1461 | }; | |
1462 | ||
04f0b2ea | 1463 | do_garbage_collect(sbi, segno, &gc_list, FG_GC); |
04f0b2ea QS |
1464 | put_gc_inode(&gc_list); |
1465 | ||
b4b10061 JK |
1466 | if (!gc_only && get_valid_blocks(sbi, segno, true)) { |
1467 | err = -EAGAIN; | |
1468 | goto out; | |
1469 | } | |
1470 | if (fatal_signal_pending(current)) { | |
1471 | err = -ERESTARTSYS; | |
1472 | goto out; | |
1473 | } | |
04f0b2ea | 1474 | } |
b4b10061 JK |
1475 | if (gc_only) |
1476 | goto out; | |
04f0b2ea | 1477 | |
b4b10061 | 1478 | err = f2fs_write_checkpoint(sbi, &cpc); |
04f0b2ea | 1479 | if (err) |
b4b10061 | 1480 | goto out; |
04f0b2ea QS |
1481 | |
1482 | next_inuse = find_next_inuse(FREE_I(sbi), end + 1, start); | |
1483 | if (next_inuse <= end) { | |
dcbb4c10 JP |
1484 | f2fs_err(sbi, "segno %u should be free but still inuse!", |
1485 | next_inuse); | |
04f0b2ea QS |
1486 | f2fs_bug_on(sbi, 1); |
1487 | } | |
b4b10061 JK |
1488 | out: |
1489 | MAIN_SECS(sbi) += secs; | |
04f0b2ea QS |
1490 | return err; |
1491 | } | |
1492 | ||
1493 | static void update_sb_metadata(struct f2fs_sb_info *sbi, int secs) | |
1494 | { | |
1495 | struct f2fs_super_block *raw_sb = F2FS_RAW_SUPER(sbi); | |
a4ba5dfc CY |
1496 | int section_count; |
1497 | int segment_count; | |
1498 | int segment_count_main; | |
1499 | long long block_count; | |
04f0b2ea QS |
1500 | int segs = secs * sbi->segs_per_sec; |
1501 | ||
a4ba5dfc CY |
1502 | down_write(&sbi->sb_lock); |
1503 | ||
1504 | section_count = le32_to_cpu(raw_sb->section_count); | |
1505 | segment_count = le32_to_cpu(raw_sb->segment_count); | |
1506 | segment_count_main = le32_to_cpu(raw_sb->segment_count_main); | |
1507 | block_count = le64_to_cpu(raw_sb->block_count); | |
1508 | ||
04f0b2ea QS |
1509 | raw_sb->section_count = cpu_to_le32(section_count + secs); |
1510 | raw_sb->segment_count = cpu_to_le32(segment_count + segs); | |
1511 | raw_sb->segment_count_main = cpu_to_le32(segment_count_main + segs); | |
1512 | raw_sb->block_count = cpu_to_le64(block_count + | |
1513 | (long long)segs * sbi->blocks_per_seg); | |
46d9ce19 QS |
1514 | if (f2fs_is_multi_device(sbi)) { |
1515 | int last_dev = sbi->s_ndevs - 1; | |
1516 | int dev_segs = | |
1517 | le32_to_cpu(raw_sb->devs[last_dev].total_segments); | |
1518 | ||
1519 | raw_sb->devs[last_dev].total_segments = | |
1520 | cpu_to_le32(dev_segs + segs); | |
1521 | } | |
a4ba5dfc CY |
1522 | |
1523 | up_write(&sbi->sb_lock); | |
04f0b2ea QS |
1524 | } |
1525 | ||
1526 | static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs) | |
1527 | { | |
1528 | int segs = secs * sbi->segs_per_sec; | |
46d9ce19 | 1529 | long long blks = (long long)segs * sbi->blocks_per_seg; |
04f0b2ea QS |
1530 | long long user_block_count = |
1531 | le64_to_cpu(F2FS_CKPT(sbi)->user_block_count); | |
1532 | ||
1533 | SM_I(sbi)->segment_count = (int)SM_I(sbi)->segment_count + segs; | |
1534 | MAIN_SEGS(sbi) = (int)MAIN_SEGS(sbi) + segs; | |
b4b10061 | 1535 | MAIN_SECS(sbi) += secs; |
04f0b2ea QS |
1536 | FREE_I(sbi)->free_sections = (int)FREE_I(sbi)->free_sections + secs; |
1537 | FREE_I(sbi)->free_segments = (int)FREE_I(sbi)->free_segments + segs; | |
46d9ce19 QS |
1538 | F2FS_CKPT(sbi)->user_block_count = cpu_to_le64(user_block_count + blks); |
1539 | ||
1540 | if (f2fs_is_multi_device(sbi)) { | |
1541 | int last_dev = sbi->s_ndevs - 1; | |
1542 | ||
1543 | FDEV(last_dev).total_segments = | |
1544 | (int)FDEV(last_dev).total_segments + segs; | |
1545 | FDEV(last_dev).end_blk = | |
1546 | (long long)FDEV(last_dev).end_blk + blks; | |
1547 | #ifdef CONFIG_BLK_DEV_ZONED | |
1548 | FDEV(last_dev).nr_blkz = (int)FDEV(last_dev).nr_blkz + | |
1549 | (int)(blks >> sbi->log_blocks_per_blkz); | |
1550 | #endif | |
1551 | } | |
04f0b2ea QS |
1552 | } |
1553 | ||
1554 | int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count) | |
1555 | { | |
1556 | __u64 old_block_count, shrunk_blocks; | |
b4b10061 | 1557 | struct cp_control cpc = { CP_RESIZE, 0, 0, 0 }; |
04f0b2ea | 1558 | unsigned int secs; |
04f0b2ea QS |
1559 | int err = 0; |
1560 | __u32 rem; | |
1561 | ||
1562 | old_block_count = le64_to_cpu(F2FS_RAW_SUPER(sbi)->block_count); | |
1563 | if (block_count > old_block_count) | |
1564 | return -EINVAL; | |
1565 | ||
46d9ce19 QS |
1566 | if (f2fs_is_multi_device(sbi)) { |
1567 | int last_dev = sbi->s_ndevs - 1; | |
1568 | __u64 last_segs = FDEV(last_dev).total_segments; | |
1569 | ||
1570 | if (block_count + last_segs * sbi->blocks_per_seg <= | |
1571 | old_block_count) | |
1572 | return -EINVAL; | |
1573 | } | |
1574 | ||
04f0b2ea QS |
1575 | /* new fs size should align to section size */ |
1576 | div_u64_rem(block_count, BLKS_PER_SEC(sbi), &rem); | |
1577 | if (rem) | |
1578 | return -EINVAL; | |
1579 | ||
1580 | if (block_count == old_block_count) | |
1581 | return 0; | |
1582 | ||
1583 | if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) { | |
dcbb4c10 | 1584 | f2fs_err(sbi, "Should run fsck to repair first."); |
10f966bb | 1585 | return -EFSCORRUPTED; |
04f0b2ea QS |
1586 | } |
1587 | ||
1588 | if (test_opt(sbi, DISABLE_CHECKPOINT)) { | |
dcbb4c10 | 1589 | f2fs_err(sbi, "Checkpoint should be enabled."); |
04f0b2ea QS |
1590 | return -EINVAL; |
1591 | } | |
1592 | ||
04f0b2ea QS |
1593 | shrunk_blocks = old_block_count - block_count; |
1594 | secs = div_u64(shrunk_blocks, BLKS_PER_SEC(sbi)); | |
b4b10061 JK |
1595 | |
1596 | /* stop other GC */ | |
1597 | if (!down_write_trylock(&sbi->gc_lock)) | |
1598 | return -EAGAIN; | |
1599 | ||
1600 | /* stop CP to protect MAIN_SEC in free_segment_range */ | |
1601 | f2fs_lock_op(sbi); | |
1602 | err = free_segment_range(sbi, secs, true); | |
1603 | f2fs_unlock_op(sbi); | |
1604 | up_write(&sbi->gc_lock); | |
1605 | if (err) | |
1606 | return err; | |
1607 | ||
1608 | set_sbi_flag(sbi, SBI_IS_RESIZEFS); | |
1609 | ||
1610 | freeze_super(sbi->sb); | |
1611 | down_write(&sbi->gc_lock); | |
1612 | mutex_lock(&sbi->cp_mutex); | |
1613 | ||
04f0b2ea QS |
1614 | spin_lock(&sbi->stat_lock); |
1615 | if (shrunk_blocks + valid_user_blocks(sbi) + | |
1616 | sbi->current_reserved_blocks + sbi->unusable_block_count + | |
1617 | F2FS_OPTION(sbi).root_reserved_blocks > sbi->user_block_count) | |
1618 | err = -ENOSPC; | |
1619 | else | |
1620 | sbi->user_block_count -= shrunk_blocks; | |
1621 | spin_unlock(&sbi->stat_lock); | |
b4b10061 JK |
1622 | if (err) |
1623 | goto out_err; | |
04f0b2ea | 1624 | |
b4b10061 | 1625 | err = free_segment_range(sbi, secs, false); |
04f0b2ea | 1626 | if (err) |
b4b10061 | 1627 | goto recover_out; |
04f0b2ea QS |
1628 | |
1629 | update_sb_metadata(sbi, -secs); | |
1630 | ||
1631 | err = f2fs_commit_super(sbi, false); | |
1632 | if (err) { | |
1633 | update_sb_metadata(sbi, secs); | |
b4b10061 | 1634 | goto recover_out; |
04f0b2ea QS |
1635 | } |
1636 | ||
1637 | update_fs_metadata(sbi, -secs); | |
1638 | clear_sbi_flag(sbi, SBI_IS_RESIZEFS); | |
68275682 | 1639 | set_sbi_flag(sbi, SBI_IS_DIRTY); |
68275682 | 1640 | |
b4b10061 | 1641 | err = f2fs_write_checkpoint(sbi, &cpc); |
04f0b2ea QS |
1642 | if (err) { |
1643 | update_fs_metadata(sbi, secs); | |
1644 | update_sb_metadata(sbi, secs); | |
1645 | f2fs_commit_super(sbi, false); | |
1646 | } | |
b4b10061 | 1647 | recover_out: |
04f0b2ea QS |
1648 | if (err) { |
1649 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
dcbb4c10 | 1650 | f2fs_err(sbi, "resize_fs failed, should run fsck to repair!"); |
04f0b2ea | 1651 | |
04f0b2ea QS |
1652 | spin_lock(&sbi->stat_lock); |
1653 | sbi->user_block_count += shrunk_blocks; | |
1654 | spin_unlock(&sbi->stat_lock); | |
1655 | } | |
b4b10061 JK |
1656 | out_err: |
1657 | mutex_unlock(&sbi->cp_mutex); | |
1658 | up_write(&sbi->gc_lock); | |
1659 | thaw_super(sbi->sb); | |
04f0b2ea | 1660 | clear_sbi_flag(sbi, SBI_IS_RESIZEFS); |
04f0b2ea QS |
1661 | return err; |
1662 | } |